Condensed Matter

New submissions

• New submissions
• Cross-lists
• Replacements

New submissions for Fri, 3 May 24

[1]  arXiv:2405.00745 [pdf, other]

Title: Non-perturbative signatures of fractons in the twisted multi-flavor Schwinger Model

Authors: Pavel P. Popov, Valentin Kasper, Maciej Lewenstein, Erez Zohar, Paolo Stornati, Philipp Hauke

Subjects: Strongly Correlated Electrons (cond-mat.str-el); High Energy Physics - Lattice (hep-lat); Quantum Physics (quant-ph)

Gauge-field configurations with non-trivial topology have profound consequences for the physics of Abelian and non-Abelian gauge theories. Over time, arguments have been gathering for the existence of gauge-field configurations with fractional topological charge, called fractons. Ground-state properties of gauge theories can drastically change in presence of fractons in the path integral. However, understanding the origin of such fractons is usually restricted to semi-classical argumentation. Here, we show that fractons persist in strongly correlated many-body systems, using the multiflavor Schwinger model of quantum electrodynamics as a paradigm example. Through detailed numerical tensor-network analysis, we find strong fracton signatures even in highly discretized lattice models, at sizes that are implementable on already existing quantum-simulation devices. Our work sheds light on how the non-trivial topology of gauge theories persists in challenging non-perturbative regimes, and it shows a path forward to probing it in table-top experiments.

[2]  arXiv:2405.00759 [pdf, ps, other]

Title: Topological Corner Modes by Composite Wannier States in Glide-Symmetric Photonic Crystal

Authors: Zhenzhen Liu, Xiaoxi Zhou, Guochao Wei, Lei Gao, Bo hou, Jun-Jun Xiao

Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Optics (physics.optics)

Second-order topological insulators can be characterized by their bulk polarization, which is believed to be intrinsically connected to the center of the Wannier function. In this study, we demonstrate the existence of second-order topological insulators that feature a pair of partially degenerate photonic bands. These arise from the nonsymmorphic glide symmetry in an all-dielectric photonic crystal. The center of the maximally localized Wannier function (MLWF) is consistently located at the origin but is not equivalent with respect to the sum of constituent polarizations. As a result, topological corner modes can be identified by the distinctly hybridized MLWFs that truncate at the sample boundary. Through full-wave numerical simulations paired with microwave experiments, the second-order topology is clearly confirmed and characterized. These topological corner states exhibit notably unique modal symmetries, which are made possible by the inversion of the Wannier bands. Our results provide an alternative approach to explore higher-order topological physics with significant potential for applications in integrated and quantum photonics.

[3]  arXiv:2405.00783 [pdf, other]

Title: Microscopic origin of twist-dependent electron transfer rate in bilayer graphene

Authors: Leonardo Coello Escalante, David T. Limmer

Subjects: Statistical Mechanics (cond-mat.stat-mech); Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Chemical Physics (physics.chem-ph)

Using molecular simulation and continuum dielectric theory, we consider how electrochemical kinetics are modulated as a function of twist angle in bilayer graphene electrodes. By establishing an effective connection between twist angle and the screening length of charge carriers within the electrode, we investigate how tunable metallicity can result in modified statistics of the electron transfer energy gap. Constant potential molecular simulations show that the activation free energy for electron transfer is an increasing function of the screening length, or decreasing function the density of states at the Fermi energy in the electrode, and subsequently a non-monotonic function of twist angle. We find the twist angle alters the density of states, which tunes the number of thermally-accessible channels for electron transfer, as well as the reorganization energy by altering the stability of the vertically excited state through attenuated image charge interactions. Understanding these effects allows us to cast the Marcus rate of interfacial electron transfer as a function of twist angle, in a manner consistent with a growing body of experimental observations.

[4]  arXiv:2405.00785 [pdf, other]

Title: Quasi-Nambu-Goldstone modes in many-body scar models

Authors: Jie Ren, Yu-Peng Wang, Chen Fang

Comments: 25 pages, 12 figures

Subjects: Strongly Correlated Electrons (cond-mat.str-el); Quantum Physics (quant-ph)

From the quasisymmetry-group perspective [Phys. Rev. Lett. 126, 120604 (2021)], we show the universal existence of collective, coherent modes of excitations with small momenta in many-body scar models in the degenerate limit, where the energy spacing in the scar tower vanishes. The number of these modes, as well as the quantum numbers carried by them, are given, not by the symmetry of the Hamiltonian, but by the quasisymmetry of the scar tower: hence the name quasi-Goldstone modes. Based on this, we draw a concrete analogy between the paradigm of spontaneous symmetry breaking and the many-body scar physics in the degenerate limit.

[5]  arXiv:2405.00787 [pdf, other]

Title: Non-uniform and anisotropic electric polarizability resulting in pronounced local repulsion minima in high-temperature superconductors

Authors: Nassim Derriche, George Sawatzky

Subjects: Superconductivity (cond-mat.supr-con); Strongly Correlated Electrons (cond-mat.str-el)

We demonstrate the dramatic effect of non-uniform, discrete electric polarizability in high-T$_{C}$ superconductors on the spatial fluctuations of the short to medium range Coulomb interactions through a real-space semiclassical model. Although this is a general property, we concentrate on the cuprates as parent compounds, in which the charge carriers are primarily concentrated on the O sublattice. The anisotropic effective Cu-O bond polarization caused by charge transfer energy modulation and the O$^{2-}$ atomic polarizability together generate a non-monotonic screened hole-hole Coulomb interaction at short distances that displays a local minimum at the in-plane second nearest neighbor O-O distance solely along the Cu-O bond direction. This is in accordance with the pseudogap phase anisotropy and the short coherence length observed in many high-T$_C$ superconductors.

[6]  arXiv:2405.00788 [pdf, other]

Title: Density and geometry of excitations in supercooled liquids up to the activation energy

Authors: Wencheng Ji, Massimo Pica Ciamarra, Matthieu Wyart

Subjects: Soft Condensed Matter (cond-mat.soft)

We introduce an algorithm to uncover the activated particle rearrangements, or excitations, regulating structural relaxation in glasses at much higher energies than previously achieved. We use it to investigate the density and geometric properties of excitations in a model system. We find that the density of excitations behaves as a shifted power-law, and confirm that this shift accounts for the increase in the activation energy controlling the relaxation dynamics. Remarkably, we find that excitations comprise a core whose properties, including the displacement of the particle moving the most, scale as a power-law of their activation energy and do not depend on temperature. Excitations also present an outer deformation field that depends on the material stability and, hence, on temperature. Our analysis suggests that while excitations suppress the transition of dynamical arrest predicted by mean-field theories, they are strongly influenced by it.

[7]  arXiv:2405.00800 [pdf, other]

Title: Irreversibility of mesoscopic processes with hydrodynamic interactions

Authors: Biswajit Das, Sreekanth K Manikandan, Shuvojit Paul, Avijit Kundu, Supriya Krishnamurthy, Ayan Banerjee

Comments: 11 pages, 3 figures

Subjects: Statistical Mechanics (cond-mat.stat-mech)

Microscopic colloidal particles are often used as probes to study the non-equilibrium activity of living matter or other complex systems. In many of these contexts hydrodynamic interactions between the probe particle and the system of interest play an important role. However little is known about what effect such interactions could have on the overall non-equilibrium characteristics of the system of interest. In this paper, we study two simple models experimentally and theoretically, which demonstrate that hydrodynamic interactions could either diminish or enhance the total entropy production of the combined system. Importantly, we show that our method of calculating entropy production helps identify heat flows consistently, even in the presence of hydrodynamic interactions. The results indicate that interactions can be finely tuned to optimize not only dynamic properties but also irreversibility and energy dissipation, thereby opening new avenues for tailored control and design of driven mesoscale systems.

[8]  arXiv:2405.00802 [pdf, ps, other]

Title: Sensing Spin Wave Excitations by Spin Defects in Few-Layer Thick Hexagonal Boron Nitride

Authors: Jingcheng Zhou, Hanyi Lu, Di Chen, Mengqi Huang, Gerald Q. Yan, Faris Al-matouq, Jiu Chang, Dziga Djugba, Zhigang Jiang, Hailong Wang, Chunhui Rita Du

Subjects: Materials Science (cond-mat.mtrl-sci)

Optically active spin defects in wide band-gap semiconductors serve as a local sensor of multiple degrees of freedom in a variety of "hard" and "soft" condensed matter systems. Taking advantage of the recent progress on quantum sensing using van der Waals (vdW) quantum materials, here we report direct measurements of spin waves excited in magnetic insulator Y3Fe5O12 (YIG) by boron vacancy $V_B^-$ spin defects contained in few-layer thick hexagonal boron nitride nanoflakes. We show that the ferromagnetic resonance and parametric spin excitations can be effectively detected by $V_B^-$ spin defects under various experimental conditions through optically detected magnetic resonance measurements. The off-resonant dipole interaction between YIG magnons and $V_B^-$ spin defects is mediated by multi-magnon scattering processes, which may find relevant applications in a range of emerging quantum sensing, computing, and metrology technologies. Our results also highlight the opportunities offered by quantum spin defects in layered two-dimensional vdW materials for investigating local spin dynamic behaviors in magnetic solid-state matters.

[9]  arXiv:2405.00811 [pdf, other]

Title: Localized and extended phases in square moiré patterns

Authors: Christian Madroñero, Gustavo Alexis Dominguez Castro, Rosario Paredes

Comments: 9 pages, 9 figures

Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Quantum Gases (cond-mat.quant-gas)

Random defects do not constitute the unique source of electron localization in two dimensions. Lattice quasidisorder generated from two inplane superimposed rotated, main and secondary, square lattices, namely monolayers where moir\'e patterns are formed, leads to a sharp localized to delocalized single-particle transition. This is demostrated here for both, discrete and continuum models of moir\'e patterns that arise as the twisting angle $\theta$ between main and secondary lattices is varied in the interval $[0, \pi/4]$. Localized to delocalized transition is recognized as the moir\'e patterns depart from being perfect square crystals to non-crystalline structures. Extended single-particle states were found for rotation angles associated with Pythagorean triples that produce perfectly periodic structures. Conversely, angles not arising from such Pythagorean triples lead to non-commensurate or quasidisordered structures, thus originating localized states. These conclusions are drawn from a stationary analysis where the standard IPR parameter measuring localization allowed us to detect the transition. While both, ground state and excited states were analyzed for the discrete model, where the secondary lattice was considered as a perturbation of the main one, the sharp transition was tracked back for the fundamental state in the continuous scenario where the secondary lattice is not a perturbation any more.

[10]  arXiv:2405.00817 [pdf, other]

Title: Chaotic behavior in Lotka-Volterra and May-Leonard models of biodiversity

Authors: D. Bazeia, M. Bongestab, B. F. de Oliveira

Comments: 8 pages, 7 figures, to appear in Chaos: An Interdisciplinary Journal of Nonlinear Science

Subjects: Statistical Mechanics (cond-mat.stat-mech); Physics and Society (physics.soc-ph); Populations and Evolution (q-bio.PE)

Quantification of chaos is a challenging issue in complex dynamical systems. In this paper, we discuss the chaotic properties of generalized Lotka-Volterra and May-Leonard models of biodiversity, via the Hamming distance density. We identified chaotic behavior for different scenarios via the specific features of the Hamming distance and the method of q-exponential fitting. We also investigated the spatial autocorrelation length to find the corresponding characteristic length in terms of the number of species in each system. In particular, the results concerning the characteristic length are in good accordance with the study of the chaotic behavior implemented in this work.

[11]  arXiv:2405.00848 [pdf, ps, other]

Title: Magnetic field expulsion in optically driven YBa$_2$Cu$_3$O$_{6.48}$

Authors: Sebastian Fava, Giovanni De Vecchi, Gregor Jotzu, Michele Buzzi, Thomas Gebert, Yiran Liu, Bernhard Keimer, Andrea Cavalleri

Comments: 37 pages, including supplementary information

Subjects: Superconductivity (cond-mat.supr-con); Strongly Correlated Electrons (cond-mat.str-el)

Coherent optical driving in quantum solids is emerging as a new research frontier, with many demonstrations of exotic non-equilibrium quantum phases. These are based on engineered band structures, and on stimulated nonlinear interactions between driven modes. Enhanced functionalities like ferroelectricity, magnetism and superconductivity have been reported in these non-equilibrium settings. In high-Tc cuprates, coherent driving of certain phonon modes induces a transient state with superconducting-like optical properties, observed far above T$_c$ and throughout the pseudogap phase. Questions remain not only on the microscopic nature of this phenomenon, but also on the macroscopic properties of these transient states, beyond the documented optical conductivities. Crucially, it is not clear if driven cuprates exhibit Meissner-like diamagnetism. Here, the time-dependent magnetic-field amplitude surrounding a driven YBa$_2$Cu$_3$O$_{6.48}$ sample is probed by measuring Faraday rotation in a GaP layer adjacent to the superconductor. For the same driving conditions that result in superconducting-like optical properties, an enhancement of magnetic field at the edge of the sample is detected, indicative of induced diamagnetism. The dynamical field expulsion measured after pumping is comparable in size to the one expected in an equilibrium type II superconductor of similar shape and size with a volume susceptibility $\chi_v$ of order -0.3. Crucially, this value is incompatible with a photo-induced increase in mobility without superconductivity. Rather, it underscores the notion of a pseudogap phase in which incipient superconducting correlations are enhanced or synchronized by the optical drive.

[12]  arXiv:2405.00862 [pdf, other]

Title: Effects of Dzyaloshinskii-Moriya interactions and dipole-dipole interactions on spin waves in finite-length ferromagnetic chains

Authors: Bushra Hussain, Michael Cottam

Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)

A spin-wave theory that includes the antisymmetric Dzyaloshinskii-Moriya exchange interactions and long-range dipole-dipole interactions is presented for finite-length ferromagnetic spin chains. It is found that three different physical situations arise, depending on the direction chosen in this geometry for the axial vector of the Dzyaloshinskii-Moriya interactions. In some cases this leads to a tilting of the equilibrium orientations near the ends of the chain due to interfacial effects and with consequential effects on the spectrum of discrete dipole-exchange spin waves. When variations are introduced for the dominant bilinear exchange interactions at the ends of the spin chain, it is shown that localized spin waves with spatial decay characteristics may occur.

[13]  arXiv:2405.00925 [pdf, other]

Title: A Python code for calculating the mean-value (Baldereschi's) point for any crystal structure

Authors: Vladan Stevanovic

Subjects: Other Condensed Matter (cond-mat.other); Materials Science (cond-mat.mtrl-sci)

A python code (mvp.py) is presented for computing the mean-value point (MVP) in the Brillouin zone first introduced by Baldereschi [1]. The code allows calculations of the MVP for any input crystal structure. Having MVP allows approximating the Brillouin zone integrals of relatively smooth, periodic functions defined in the reciprocal space by the value of the same function at only one, mean-value, k-point. This approximation decreases computational cost at a relatively small decrease in accuracy. The MVP coordinates for the 14 Bravais lattices are evaluated and the underlying theory is discussed.

[14]  arXiv:2405.01005 [pdf, ps, other]

Title: Hundness and band renormalization in the kagome antiferromagnets Mn$_3X$

Authors: Yingying Cao, Yuanji Xu, Yi-feng Yang

Subjects: Materials Science (cond-mat.mtrl-sci); Strongly Correlated Electrons (cond-mat.str-el)

The interplay of topological band structures and electronic correlations may lead to novel exotic quantum phenomena with potential applications. First-principles calculations are critical for guiding the experimental discoveries and interpretations, but often fail if electronic correlations cannot be properly treated. Here we show that this issue occurs also in the antiferromagnetic kagome lattice Mn$_3X$ ($X=$ Sn, Ge), which exhibit a large anomalous Hall effect due to topological band structures with Weyl nodes near the Fermi energy. Our systematic investigations reveal a crucial role of the Hund's rule coupling on three key aspects of their magnetic, electronic, and topological properties: (1) the establishment of noncollinear antiferromagnetic orders, (2) the weakly renormalized bands in excellent agreement with ARPES, and (3) a sensitive tuning of the Weyl nodes beyond previous expectations. Our work provides a basis for understanding the topological properties of Mn$_3X$ and challenges previous experimental interpretations based on incorrect band structures.

[15]  arXiv:2405.01006 [pdf, ps, other]

Title: Understanding the phase stability in multi-principal-component AlCuFeMn alloy

Authors: Palash Swarnakar, M. Ghosh, B. Mahato, Partha Sarathi De, Amritendu Roy

Subjects: Materials Science (cond-mat.mtrl-sci)

Method(s) that can reliably predict phase evolution across thermodynamic parameter space, especially in complex systems are of critical significance in academia as well as in the manufacturing industry. In the present work, phase stability in equimolar AlCuFeMn multi-principal-component alloy (MPCA) was predicted using complementary first-principles density functional theory (DFT) calculations, and ab-initio molecular dynamics (AIMD) simulations. Temperature evolution of completely disordered, partially ordered, and completely ordered phases was examined based on Gibbs free energy. Configurational, electronic, vibrational, and lattice mismatch entropies were considered to compute the Gibbs free energy of the competing phases. Additionally, elemental segregation was studied using ab-initio molecular dynamics (AIMD). The predicted results at 300K align well with room-temperature experimental observations using x-ray diffraction, scanning and transmission electron microscopy on a sample prepared using commercially available pure elements. The adopted method could help in predicting plausible phases in other MPCA systems with complex phase stability.

[16]  arXiv:2405.01048 [pdf, ps, other]

Title: Evolution of Interface Magnetism in Fe/Alq3 Bilayer Structure; Thickness-Dependent Interface Resolved Studies Under X-Ray Standing Wave

Authors: Avinash G Khanderao, V R Reddy, Ilya Sergueev, Dileep Kumar

Subjects: Materials Science (cond-mat.mtrl-sci)

In the present work, interfacial magnetism at metal organic interface is probed using an isotope sensitive interface resolved nuclear resonance scattering technique which is made depth selective under x-rays standing wave conditions. Using GIWAXS and GINRS measurements, this study evidences the presence of symmetry-based PMA which appears at a lower thickness of Fe having distortion in cubic symmetry and disappears at a higher thickness of Fe as its cubic symmetry retains. The non-zero value of quadrupole splitting evidences the strain at the interfacial region which on increasing thickness of Fe relaxes. The diffusion of Fe is traced using XRF and NRR, deep penetration of Fe in Alq3 layer due to soft nature of the organic film is obtained. This thickness-dependent study enables us to understand the magnetic behavior of buried ferromagnetic metal in the vicinity of organic molecules.

[17]  arXiv:2405.01058 [pdf, ps, other]

Title: An eco-friendly passivation strategy of resveratrol for highly efficient and antioxidative perovskite solar cells

Authors: Xianhu Wu, Jieyu Bi, Guanglei Cui, Nian Liu, Gaojie Xia, Ping Li, Chunyi Zhao, Zewen Zuo, Min Gu

Subjects: Materials Science (cond-mat.mtrl-sci); Applied Physics (physics.app-ph)

The stability of perovskite solar cells is closely related to the defects in perovskite crystals, and there are a large number of crystal defects in the perovskite thin films prepared by the solution method, which is not conducive to the commercial production of PSCs. In this study, resveratrol(RES), a green natural antioxidant abundant in knotweed and grape leaves, was introduced into perovskite films to passivate the defect. RES achieves defect passivation by interacting with uncoordinated Pb2+ in perovskite films. The results show that the quality of the perovskite film is significantly improved, and the energy level structure of the device is optimized, and the power conversion efficiency of the device is increased from 21.62% to 23.44%. In addition, RES can hinder the degradation of perovskite structures by O2- and CO2- free radicals, and the device retained 88% of its initial PCE after over 1000 hours in pure oxygen environment. The device retains 91% of the initial PCE after more than 1000 hours at 25{\deg}C and 50+5% relative humidity. This work provides a strategy for the use of natural and environmentally friendly additives to improve the efficiency and stability of devices, and provides an idea for the development of efficient, stable and environmentally friendly PSCs.

[18]  arXiv:2405.01075 [pdf, other]

Title: Non-equilibrium carrier dynamics and band structure of graphene on 2D tin

Authors: Maria-Elisabeth Federl, Niklas Witt, Biao Yang, Niklas Hofmann, Johannes Gradl, Leonard Weigl, Ignacio Piquero-Zulaica, Johannes V. Barth, Neeraj Mishra, Camilla Coletti, Tim O. Wehling, Isabella Gierz

Comments: 19 pages, 5 figures

Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Materials Science (cond-mat.mtrl-sci)

Intercalation of epitaxial graphene on SiC(0001) with Sn results in a well-ordered 2D metallic Sn phase with a $(1\times1)$ structure at the interface between SiC substrate and quasi-freestanding graphene. The 2D\,Sn phase exhibits exotic electronic properties with Dirac-like and flat bands coexisting close to the Fermi level that exhibit both Zeeman- and Rashba-type spin splittings. Possible inter-layer interactions between the 2D\,Sn layer and graphene that may result in emerging electronic properties remain unexplored. We use time- and angle-resolved photoemission spectroscopy to reveal a surprisingly short-lived non-equilibrium carrier distribution inside the Dirac cone of graphene. Further, we find that the graphene $\pi$-band exhibits a transient down-shift that we attribute to charging of the graphene layer with holes. We interpret our results with support from density functional theory calculations of the graphene - 2D\,Sn heterostructure that reveal a substantial hybridization between graphene $\pi$-band and Sn $p_z$-states that opens up a $\sim230$\,meV band gap inside the Dirac cone and delocalizes the charge carriers over both the graphene and 2D\,Sn layers. Our results have important implications for the design of future ultrafast optoelectronic devices that may find applications in the fields of light harvesting and detection, as supercapacitors, or in novel quantum computing technologies.

[19]  arXiv:2405.01120 [pdf, ps, other]

Title: Optically detected magnetic resonance study of thermal effects due to absorbing environment around nitrogen-vacancy-nanodiamond powders

Authors: Mona Jani, Zuzanna Orzechowska, Mariusz Mrozek, Marzena Mitura-Nowak, Wojciech Gawlik, Adam M. Wojciechowski

Comments: 21 pages, 6 figures

Subjects: Materials Science (cond-mat.mtrl-sci); Quantum Physics (quant-ph)

We implanted Fe$^+$ ions in nanodiamond (ND) powder containing negatively charged nitrogen-vacancy (NV-) centers and studied their Raman spectra and optically detected magnetic resonance (ODMR) in various applied magnetic fields with green light (532 nm) excitation. In Raman spectra, we observed a blue shift of the NV$^-$ peak associated with the conversion of the electronic sp$^3$ configuration to the disordered sp$^2$ one typical for the carbon/graphite structure. In the ODMR spectra, we observed a red shift of the resonance position caused by local heating by an absorptive environment that recovers after annealing. To reveal the red shift mechanism in ODMR, we created a controlled absorptive environment around ND by adding iron-based Fe$_2$O$_3$ and graphitic sp$^2$ powders to the ND suspension. This admixture caused a substantial increase in the observed shift proportional to the applied laser power, corresponding to an increase in the local temperature by 150-180 K. This surprisingly large shift is absent in non-irradiated NV-ND powders, is associated only with the modification of the local temperature by the absorptive environment of NV-NDs and can be studied using ODMR signals of NV$^-$.

[20]  arXiv:2405.01128 [pdf, other]

Title: A matter of performance & criticality: a review of rare-earth-based magnetocaloric intermetallic compounds for hydrogen liquefaction

Authors: Wei Liu, Tino Gottschall, Franziska Scheibel, Eduard Bykov, Alex Aubert, Nuno Fortunato, Benedikt Beckmann, Allan M. Döring, Hongbin Zhang, Konstantin Skokov, Olivler Gutfleisch

Subjects: Materials Science (cond-mat.mtrl-sci); Applied Physics (physics.app-ph)

The low efficiency of conventional liquefaction technologies based on the Joule-Thomson expansion makes liquid hydrogen currently not attractive enough for large-scale energy-related technologies that are important for the transition to a carbon-neutral society. Magnetocaloric hydrogen liquefaction has great potential to achieve higher efficiency and is therefore a crucial enabler for affordable liquid hydrogen. Cost-effective magnetocaloric materials with large magnetic entropy and adiabatic temperature changes in the temperature range of 77 $\sim$ 20 K under commercially practicable magnetic fields are the foundation for the success of magnetocaloric hydrogen liquefaction. Heavy rare-earth-based magnetocaloric intermetallic compounds generally show excellent magnetocaloric performances, but the heavy rare-earth elements (Gd, Tb, Dy, Ho, Er, and Tm) are highly critical in resources. Yttrium and light rare-earth elements (La, Ce, Pr, and Nd) are relatively abundant, but their alloys generally show less excellent magnetocaloric properties. A dilemma appears: higher performance or lower criticality? In this review, we study how cryogenic temperature influences magnetocaloric performance by first reviewing heavy rare-earth-based intermetallic compounds. Next, we look at light rare-earth-based, "mixed" rare-earth-based, and Gd-based intermetallic compounds with the nature of the phase transition order taken into consideration, and summarize ways to resolve the dilemma.

[21]  arXiv:2405.01138 [pdf, other]

Title: Scaling of phase count in multicomponent liquids

Authors: Yicheng Qiang, Chengjie Luo, David Zwicker

Comments: 15 pages, 10 figures, including appendix

Subjects: Soft Condensed Matter (cond-mat.soft); Biological Physics (physics.bio-ph)

Mixtures with many components can segregate into coexisting phases, e.g., in biological cells and synthetic materials such as metallic glass. The interactions between components dictate what phases form in equilibrium, but quantifying this relationship has proven difficult. We derive scaling relations for the number of coexisting phases in multicomponent liquids with random interactions and compositions, which we verify numerically. Our results indicate that interactions only need to increase logarithmically with the number of components for the liquid to segregate into many phases. In contrast, a stability analysis of the homogeneous state predicts a power-law scaling. This discrepancy implies an enormous parameter regime where the number of coexisting phases exceeds the number of unstable modes, generalizing the nucleation and growth regime of binary mixtures to many components.

[22]  arXiv:2405.01203 [pdf, other]

Title: Optimization of reactively sputtered Mn3GaN films based on resistivity measurements

Authors: Christoph Sürgers, Gerda Fischer, Sihao Deng, Dongmei Hu, Cong Wang

Comments: 7 pages, 5 figures, 43 references

Subjects: Materials Science (cond-mat.mtrl-sci)

Mn-based nitrides with antiperovskite structures have several properties that can be utilised for antiferromagnetic spintronics. Their magnetic properties depend on the structural quality, composition and doping of the cubic antiperovskite structure. Such nitride thin films are usually produced by reactive physical vapour deposition, where the deposition rate of N can only be controlled by the N2 gas flow. We show that the tuning of the N content can be optimised using low temperature resistivity measurements, which serve as an indicator of the degree of structural disorder. Several Mn3GaNx films were prepared by reactive magnetron sputtering under different N2 gas flows. Under optimised conditions, we obtain films that exhibit a metal-like temperature dependence, a vanishing logarithmic increase in resistivity towards zero, the highest resistivity ratio and a lattice contraction of 0.4 % along the growth direction when heated above that of the N\'eel temperature in agreement with the bulk samples.

[23]  arXiv:2405.01211 [pdf, other]

Title: Tomography of a single-atom-resolved detector in the presence of shot-to-shot number fluctuations

Authors: Maxime Allemand, Raphael Jannin, Géraud Dupuy, Jan-Philipp Bureik, Luca Pezzè, Denis Boiron, David Clément

Comments: 7 pages, 5 figures

Subjects: Quantum Gases (cond-mat.quant-gas); Atomic Physics (physics.atom-ph); Quantum Physics (quant-ph)

Tomography of single-particle-resolved detectors is of primary importance for characterizing particle correlations with applications in quantum metrology, quantum simulation and quantum computing. However, it is a non-trivial task in practice due to the unavoidable presence of noise that affects the measurement but does not originate from the detector. In this work, we address this problem for a three-dimensional single-atom-resolved detector where shot-to-shot atom number fluctuations are a central issue to perform a quantum detector tomography. We overcome this difficulty by exploiting the parallel measurement of counting statistics in sub-volumes of the detector, from which we evaluate the effect of shot-to-shot fluctuations and perform a local tomography of the detector. In addition, we illustrate the validity of our method from applying it to Gaussian quantum states with different number statistics. Finally, we show that the response of Micro-Channel Plate detectors is well-described from using a binomial distribution with the detection efficiency as a single parameter.

[24]  arXiv:2405.01240 [pdf, other]

Title: Machine-learned tuning of artificial Kitaev chains from tunneling-spectroscopy measurements

Authors: Jacob Benestad, Athanasios Tsintzis, Rubén Seoane Souto, Martin Leijnse, Evert van Nieuwenburg, Jeroen Danon

Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)

We demonstrate reliable machine-learned tuning of quantum-dot-based artificial Kitaev chains to Majorana sweet spots, using the covariance matrix adaptation algorithm. We show that a loss function based on local tunnelling-spectroscopy features of a chain with two additional sensor dots added at its ends provides a reliable metric to navigate parameter space and find points where crossed Andreev reflection and elastic cotunneling between neighbouring sites balance in such a way to yield near-zero-energy modes with very high Majorana quality. We simulate tuning of two- and three-site Kitaev chains, where the loss function is found from calculating the low-energy spectrum of a model Hamiltonian that includes Coulomb interactions and finite Zeeman splitting. In both cases, the algorithm consistently converges towards high-quality sweet spots. Since tunnelling spectroscopy provides one global metric for tuning all on-site potentials simultaneously, this presents a promising way towards tuning longer Kitaev chains, which are required for achieving topological protection of the Majorana modes.

[25]  arXiv:2405.01300 [pdf, other]

Title: Partially bonded crystals: a pathway to porosity and polymorphism

Authors: Carina Karner, Emanuela Bianchi

Comments: 15 pages, 10 figures, Electronic Supporting Information included at the end

Subjects: Soft Condensed Matter (cond-mat.soft); Disordered Systems and Neural Networks (cond-mat.dis-nn)

In recent years, experimental and theoretical investigations have shown that anisotropic colloids can self-organise into ordered porous monolayers, where the interplay of localised bonding sites, so called patches, with the particle's shape is responsible for driving the systems away from close-packing and towards porosity. Until now it has been assumed that patchy particles have to be fully bonded with their neighbouring particles for crystals to form, and that, if full bonding cannot be achieved due to the choice of patch placement, disordered assemblies will form instead. In contrast, we show that by deliberately displacing the patches such that full bonding is disfavored, a different route to porous crystalline monolayers emerges, where geometric frustration and partial bonding are pivotal in the structure formation process. The resulting dangling bonds lead to the emergence of effectively chiral units which then act as building blocks for energetically equivalent crystal polymorphs.

[26]  arXiv:2405.01307 [pdf, other]

Title: Prediction of Room-Temperature Electric Field Reversal of Magnetization in the Family of $A_4B_3$O$_9$ Layered Oxides

Authors: Urmimala Dey, Emma E. McCabe, Nicholas C. Bristowe

Subjects: Materials Science (cond-mat.mtrl-sci)

The promise of a strong magnetoelectric (ME) coupling in a multiferroic (MF) material is not only of fundamental interest, but also forms the basis of next generation memory devices where the direction of magnetization can be reversed by an external electric field. Using group-theory led first-principles calculations, we determine the ME properties of a relatively understudied family of layered oxides with the general formula $A_4B_3$O$_9$. We show how the tetrahedral rotations in these oxides can lead to a variety of hitherto unknown structural phases with different symmetries. In particular, a polar phase in the $Cmc2_1$ space group has been identified where a weak ferromagnetic mode arises spontaneously via a canting of the antiferromagnetically ordered $B$-site spins. In this polar phase, the polar mode couples to the magnetic modes through a rare $\Gamma$-point ME-MF coupling scheme such that the net magnetization can be directly reversed by an electric field switching of the polar mode. Moreover, in agreement with previous experimental observations, we predict room-temperature magnetism in $A_4B_3$O$_9$ layered oxides which is supported by our calculations of the magnetic exchange interaction parameters, further indicating the potential of these compounds in practical technological applications.

[27]  arXiv:2405.01320 [pdf, other]

Title: Unsupervised identification of local atomic environment from atomistic potential descriptors

Authors: Lukáš Kývala, Pablo Montero De Hijes, Christoph Dellago

Subjects: Materials Science (cond-mat.mtrl-sci); Chemical Physics (physics.chem-ph); Computational Physics (physics.comp-ph)

Analyzing local structures effectively is key to unraveling the origin of many physical phenomena. Unsupervised algorithms offer an effective way of handling systems in which order parameters are unknown or computationally expensive. By combining novel unsupervised algorithm (Pairwise Controlled Manifold Approximation Projection) with atomistic potential descriptors, we distinguish between various chemical environments with minimal computational overhead. In particular, we apply this method to silicon and water systems. The algorithm effectively distinguishes between solid structures and phases of silicon, including solid and liquid phases, and accurately identifies interstitial, monovacancy, and surface atoms in diamond structures. In the case of water, it is capable of identifying an ice nucleus in the liquid phase, demonstrating its applicability in nucleation studies.

[28]  arXiv:2405.01323 [pdf, other]

Title: Direct evidence for efficient carrier multiplication in the topological insulator Bi$_2$Se$_3$

Authors: Michael Herb, Leonard Weigl, Niklas Hofman, Johannes Gradl, Jason F. Khoury, Leslie Schoop, Isabella Gierz

Comments: 16 pages, 7 figures

Subjects: Materials Science (cond-mat.mtrl-sci)

Carrier multiplication (CM), where the absorption of a single photon results in the generation of several electron-hole pairs via impact ionization, plays a pivotal role in the quest for enhancing the performance of solar cells beyond the Shockley-Queisser limit. The combination of its narrow bandgap relative to the photon energy of visible light, along with its low phonon frequencies that hinder efficient energy dissipation into phonons, makes the topological insulator Bi$_2$Se$_3$ an optimal candidate material for efficient CM. Here we use time- and angle-resolved photoemission spectroscopy (trARPES) to trace the number of electron-hole pairs after photoexcitation of Bi$_2$Se$_3$ with visible pump pulses at $\hbar\omega=2$ eV. We find that both the number of electrons inside the conduction band as well as the number of holes inside the valence band keep increasing long after the pump pulse is gone, providing direct evidence for CM. We also analyze the transient band structure as well as the hot carrier dynamics inside the conduction band, providing a complete picture of the non-equilibrium carrier dynamics in photoexcited Bi$_2$Se$_3$ which can now serve as a basis for novel optoelectronic applications.

[29]  arXiv:2405.01331 [pdf, other]

Title: On Nanowire Morphological Instability and Pinch-Off by Surface Electromigration

Authors: Mikhail Khenner

Subjects: Materials Science (cond-mat.mtrl-sci); Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Mathematical Physics (math-ph); Applied Physics (physics.app-ph)

Surface diffusion and surface electromigration may lead to a morphological instability of thin solid films and nanowires. In this paper two nonlinear analyzes of a morphological instability are developed for a single-crystal cylindrical nanowire that is subjected to the axial current. These treatments extend the conventional linear stability analyzes without surface electromigration, that manifest a Rayleigh-Plateau instability. A weakly nonlinear analysis is done slightly above the Rayleigh-Plateau (longwave) instability threshold. It results in a one-dimensional Sivashinsky amplitude equation that describes a blow-up of a surface perturbation amplitude in a finite time. This is a signature of a formation of an axisymmetric spike singularity of a cylinder radius, which leads to a wire pinch-off and separation into a disjoint segments. The scaling analysis of the amplitude spike singularity is performed, and the time-and-electric field-dependent dimensions of the spike are characterized. A weakly nonlinear multi-scale analysis is done at the arbitrary distance above a longwave or a shortwave instability threshold. The time-and-electric field-dependent Fourier amplitudes of the major instability modes are derived and characterized.

[30]  arXiv:2405.01334 [pdf, ps, other]

Title: Nutation: separating the spin from its magnetic moment

Authors: Anulekha De, Julius Schlegel, Akira Lentfert, Laura Scheuer, Benjamin Stadtmüller, Philipp Pirro, Georg von Freymann, Ulrich Nowak, Martin Aeschlimann

Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Materials Science (cond-mat.mtrl-sci)

For nearly 90 years, precession and relaxation processes have been thought to dominate magnetization dynamics. Only recently has it been considered that, on short time scales, an inertia-driven magnetization dynamics should become relevant, leading to additional nutation of the magnetization vector. Here, we trigger magnetic nutation via a sudden excitation of a thin Ni80Fe20 (Permalloy) film with an ultrashort optical pulse, that leads to an abrupt tilting of the effective field acting on the magnetic moments, separating the dynamics of the magnetization from that of its angular momentum. We investigate the resulting magnetization dynamics in the inertial regime experimentally by the time-resolved magneto optical Kerr effect. We find a characteristic oscillation in the Kerr signal in the range of about 0.1 THz superimposed on the precessional oscillations with GHz frequencies. By comparison with atomistic spin dynamics simulations, we demonstrate that this observation cannot be explained by the well-known Landau-Lifshitz-Gilbert equation of motion but can be attributed to inertial contributions leading to nutation of the magnetization vector around its angular momentum. Hence, an optical and non-resonant excitation of inertial magnetization dynamics can trigger and control different magnetic processes, ranging from demagnetization via nutation to precession in a single device. These findings will have profound implications for the understanding of ultrafast spin dynamics and magnetization switching.

[31]  arXiv:2405.01351 [pdf, other]

Title: High harmonic generation from electrons moving on topological spin textures

Authors: Atsushi Ono, Shun Okumura, Shohei Imai, Yutaka Akagi

Comments: 15 pages, 15 figures

Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Strongly Correlated Electrons (cond-mat.str-el)

High harmonic generation (HHG) is a striking phenomenon, which reflects the ultrafast dynamics of electrons. Recently, it has been demonstrated that HHG can be used to reconstruct not only the energy band structure but also the geometric structure characterized by the Berry curvature. Here, we numerically investigate HHG arising from electrons coupled with a topological spin texture in a spin scalar chiral state where time reversal symmetry is broken. In this system, a sign change in scalar chirality alters the sign of the Berry curvature while keeping the energy band structure unchanged, allowing us to discuss purely geometrical effects on HHG. Notably, we found that, when the optical frequency is significantly lower than the energy gap, the sign of scalar chirality largely affects the longitudinal response parallel to the optical field rather than the transverse response. Our analysis suggests that this can be attributed to interband currents induced by the recombination of electron-hole pairs whose real-space trajectories are modulated by the anomalous velocity term.

[32]  arXiv:2405.01363 [pdf, other]

Title: Information propagation in Gaussian processes on multilayer networks

Authors: Giorgio Nicoletti, Daniel Maria Busiello

Subjects: Statistical Mechanics (cond-mat.stat-mech)

Complex systems with multiple processes evolving on different temporal scales are naturally described by multilayer networks, where each layer represents a different timescale. In this work, we show how the multilayer structure shapes the generation and propagation of information between layers. We derive a general decomposition of the multilayer probability for continuous stochastic processes described by Fokker-Planck operators. In particular, we focus on Gaussian processes, for which this solution can be obtained analytically. By explicitly computing the mutual information between the layers, we derive the fundamental principles that govern how information is propagated by the topology of the multilayer network. In particular, we unravel how edges between nodes in different layers affect their functional couplings. We find that interactions from fast to slow layers alone do not generate information, leaving the layers statistically independent even if they affect their dynamical evolution. On the other hand, interactions from slow to fast nodes lead to non-zero mutual information, which can then be propagated along specific paths of interactions between layers. We employ our results to study the interplay between information and instability, identifying the critical layers that drive information when pushed to the edge of stability. Our work generalizes previous results obtained in the context of discrete stochastic processes, allowing us to understand how the multilayer nature of complex systems affects their functional structure.

[33]  arXiv:2405.01371 [pdf, other]

Title: k-resolved ultrafast light-induced band renormalization in monolayer WS$_2$ on graphene

Authors: Niklas Hofmann, Alexander Steinhoff, Razvan Krause, Neeraj Mishra, Giorgio Orlandini, Stiven Forti, Camilla Coletti, Tim O. Wehling, Isabella Gierz

Comments: 17 pages, 4 figures

Subjects: Materials Science (cond-mat.mtrl-sci)

Understanding and controlling the electronic properties of two-dimensional materials is crucial for their potential applications in nano- and optoelectronics. Monolayer transition metal dichalcogenides such as WS$_2$ have garnered significant interest due to their strong light-matter interaction and extreme sensitivity of the band structure to the presence of photogenerated electron-hole pairs. In this study, we investigate the transient electronic structure of monolayer WS$_2$ on a graphene substrate after resonant excitation of the A-exciton using time- and angle-resolved photoemission spectroscopy. We observe a pronounced band structure renormalization including a substantial reduction of the transient band gap that is in good quantitative agreement with our {\it ab initio} theory that reveals the importance of both intrinsic WS$_2$ and extrinsic substrate contributions to the transient band structure of monolayer WS$_2$. Our findings not only deepen the fundamental understanding of band structure dynamics in two-dimensional materials but also offer valuable insights for the development of novel electronic and optoelectronic devices based on monolayer TMDs and their heterostructures with graphene.

[34]  arXiv:2405.01383 [pdf, other]

Title: On degenerate perturbation theory for the Floquet-Hilbert space

Authors: Yakov Braver, Egidijus Anisimovas

Comments: 16 pages, 4 figures

Subjects: Quantum Gases (cond-mat.quant-gas)

We consider construction of effective Hamiltonians for periodically driven interacting systems in the case of resonant driving. The standard high-frequency expansion is not expected to converge due to the resonant creation of collective excitations, and one option is to resort to the application of degenerate perturbation theory (DPT) in the extended Floquet-Hilbert space. We propose an extension of DPT whereby the degenerate subspace includes not only the degenerate levels of interest but rather all the states of the system. The resulting approach, which we call extended DPT (EDPT), is shown to resemble a high-frequency expansion, provided the quasienergy matrix is constructed such that each $m$th diagonal block contains energies reduced to the $m$th Floquet zone. The proposed theory is applied to a driven Bose-Hubbard model and is shown to yield more accurate quasienergy spectra than the conventional DPT. The computational complexity of EDPT is intermediate between DPT and the numerically exact approach, thus providing a practical compromise between accuracy and efficiency.

[35]  arXiv:2405.01401 [pdf, other]

Title: Breaking and trapping Cooper pairs by Rydberg-molecule spectroscopy in atomic Fermi superfluids

Authors: Chih-Chun Chien, Symeon I. Mistakidis, Hossein R. Sadeghpour

Comments: Main text: 5 pages, 4 figures. Supplemental Material: 4 pages, 8 figures

Subjects: Quantum Gases (cond-mat.quant-gas); Quantum Physics (quant-ph)

We propose a spectroscopic probe of the breaking and localization of Cooper pairs in an atomic Fermi superfluid interacting with a Rydberg impurity. This is achieved by monitoring the formation of diatomic and triatomic ultralong-range molecular species in the superfluid across the BCS - Bose Einstein condensation (BEC) crossover. The triatomic Rydberg molecule in the BEC regime heralds the trapping of a tightly-bound Cooper pair, reminiscent of pion capture in nuclear matter, while the breaking of a Cooper pair on the BCS side by a diatomic Rydberg molecule is evocative of binary-star tidal disruption by a black hole. Spectroscopy of the Fermi superfluid and Rydberg molecules allows for an estimation of the Cooper-pair size while the Rydberg molecule binding energies discern many-body pairing effects.

[36]  arXiv:2405.01445 [pdf, ps, other]

Title: Depth-resolved profile of the interfacial ferromagnetism in $CaMnO_{3}/CaRuO_{3}$ superlattices

Authors: J. R. Paudel, A. Mansouri Tehrani, M. Terilli, M. Kareev, J. Grassi, R. K. Sah, L. Wu, V. N. Strocov, C. Klewe, P. Shafer, J. Chakhalian, N. A. Spaldin, A. X. Gray

Subjects: Materials Science (cond-mat.mtrl-sci); Strongly Correlated Electrons (cond-mat.str-el)

Emergent magnetic phenomena at interfaces represent a frontier in materials science, pivotal for advancing technologies in spintronics and magnetic storage. In this letter, we utilize a suite of advanced X-ray spectroscopic and scattering techniques to investigate emergent interfacial ferromagnetism in oxide superlattices comprised of antiferromagnetic CaMnO3 and paramagnetic CaRuO3. Our findings challenge prior theoretical models by demonstrating that the ferromagnetism extends beyond the interfacial layer into multiple unit cells of CaMnO3 and exhibits an asymmetric profile. Complementary density functional calculations reveal that the interfacial ferromagnetism is driven by the double exchange mechanism, facilitated by charge transfer from Ru to Mn ions. Additionally, defect chemistry, particularly the presence of oxygen vacancies, likely plays a crucial role in modifying the magnetic moments at the interface, leading to the observed asymmetry between the top and bottom CaMnO3 interfacial magnetic layers. Our findings underscore the potential of manipulating interfacial ferromagnetism through point defect engineering.

[37]  arXiv:2405.01455 [pdf, other]

Title: Anomalous phonon Grüneisen parameters in semiconductor Ta$_2$NiS$_5$

Authors: Mai Ye, Tom Lacmann, Mehdi Frachet, Igor Vinograd, Gaston Garbarino, Nour Maraytta, Michael Merz, Rolf Heid, Amir-Abbas Haghighirad, Matthieu Le Tacon

Subjects: Strongly Correlated Electrons (cond-mat.str-el); Materials Science (cond-mat.mtrl-sci)

Strain tuning is a powerful experimental method in probing correlated electron systems. Here we study the strain response of the lattice dynamics and electronic structure in semiconductor Ta$_2$NiS$_5$ by polarization-resolved Raman spectroscopy. We observe an increase of the size of the direct semiconducting band gap. Although the majority of the optical phonons show only marginal dependence to applied strain, the frequency of the two B$_{2g}$ phonon modes, which have quadrupolar symmetry and already anomalously soften on cooling under zero strain, increases significantly with tensile strain along the $a$ axis. The corresponding Gr\"uneisen parameters are unusually large in magnitude and negative in sign. These effects are well captured by first-principles density functional theory calculations and indicate close proximity of Ta$_2$NiS$_5$ to a structural instability, similar to that encountered in excitonic insulator candidate Ta$_2$NiSe$_5$.

[38]  arXiv:2405.01489 [pdf, other]

Title: Single-layer tensor network approach for three-dimensional quantum systems

Authors: Illia Lukin, Andrii Sotnikov

Comments: 10 pages, 11 figures

Subjects: Strongly Correlated Electrons (cond-mat.str-el); Quantum Physics (quant-ph)

Calculation of observables with three-dimensional projected entangled pair states is generally hard, as it requires a contraction of complex multi-layer tensor networks. We utilize the multi-layer structure of these tensor networks to largely simplify the contraction. The proposed approach involves the usage of the layer structure both to simplify the search for the boundary projected entangled pair states and the single-layer mapping of the final corner transfer matrix renormalization group contraction. We benchmark our results on the cubic lattice Heisenberg model, reaching the bond dimension D = 7, and find a good agreement with the previous results.

[39]  arXiv:2405.01499 [pdf, other]

Title: Optical Manipulation of Spin States in Ultracold Magnetic Atoms via an Inner-Shell Hz Transition

Authors: Ferdinand Claude, Louis Lafforgue, J. J. Arfor Houwman, Manfred J. Mark, Francesca Ferlaino

Subjects: Quantum Gases (cond-mat.quant-gas)

Lanthanides, like erbium and dysprosium, have emerged as powerful platforms for quantum-gas research due to their diverse properties, including a significant large spin manifold in their absolute ground state. However, effectively exploiting the spin richness necessitates precise manipulation of spin populations, a challenge yet to be fully addressed in this class of atomic species. In this work, we present an all-optical method for deterministically controlling the spin composition of a dipolar bosonic erbium gas, based on a clock-like transition in the telecom window at 1299 nm. The atoms can be prepared in just a few tens of microseconds in any spin-state composition using a sequence of Rabi-pulse pairs, selectively coupling Zeeman sublevels of the ground state with those of the long-lived clock-like state. Finally, we demonstrate that this transition can also be used to create spin-selective light shifts, thus fully suppressing spin-exchange collisions. These experimental results unlock exciting possibilities for implementing advanced spin models in isolated, clean and fully controllable lattice systems.

[40]  arXiv:2405.01506 [pdf, other]

Title: Chirotactic response of microswimmers in fluids with odd viscosity

Authors: Yuto Hosaka, Michalis Chatzittofi, Ramin Golestanian, Andrej Vilfan

Comments: 8 pages, 3 figures

Subjects: Soft Condensed Matter (cond-mat.soft)

Odd viscosity is a property of chiral active fluids with broken time-reversal and parity symmetries. We show that the flow of such a fluid around a rotating axisymmetric body is exactly solvable and use this solution to determine the orientational dynamics of surface-driven microswimmers. Swimmers with a force-dipole moment exhibit precession around the axis of the odd viscosity. In addition, pushers show bimodal chirotaxis, i.e., alignment parallel or antiparallel to the axis, while pullers orbit in a plane perpendicular to it. A chiral swimmer that itself has a broken parity symmetry can exhibit unimodal chirotaxis and always align in the same direction.

[41]  arXiv:2405.01520 [pdf, ps, other]

Title: AI for Manufacturing and Healthcare: a chemistry and engineering perspective

Authors: Jihua Chen, Yue Yuan, Amir Koushyar Ziabari, Xuan Xu, Honghai Zhang, Panagiotis Christakopoulos, Peter V. Bonnesen, Ilia N. Ivanov, Panchapakesan Ganesh, Chen Wang, Karen Patino Jaimes, Guang Yang, Rajeev Kumar, Bobby G. Sumpter, Rigoberto Advincula

Subjects: Materials Science (cond-mat.mtrl-sci)

Artificial Intelligence (AI) approaches are increasingly being applied to more and more domains of Science, Engineering, Chemistry, and Industries to not only improve efficiencies and enhance productivity, but also enable new capabilities. The new opportunities range from automated molecule design and screening, properties prediction, gaining insights of chemical reactions, to computer-aided design, predictive maintenance of systems, robotics, and autonomous vehicles. This review focuses on the new applications of AI in manufacturing and healthcare. For the Manufacturing Industries, we focus on AI and algorithms for (1) Battery, (2) Flow Chemistry, (3) Additive Manufacturing, (4) Sensors, and (5) Machine Vision. For Healthcare applications, we focus on: (1) Medical Vision (2) Diagnosis, (3) Protein Design, and (4) Drug Discovery. In the end, related topics are discussed, including physics integrated machine learning, model explainability, security, and governance during model deployment.

[42]  arXiv:2405.01537 [pdf, other]

Title: Observation of an inverse turbulent-wave cascade in a driven quantum gas

Authors: Andrey Karailiev, Martin Gazo, Maciej Gałka, Christoph Eigen, Tanish Satoor, Zoran Hadzibabic

Comments: Main text: 4 pages, 5 figures; Supplemental material: 1 page, 1 figure

Subjects: Quantum Gases (cond-mat.quant-gas); Statistical Mechanics (cond-mat.stat-mech); Atomic Physics (physics.atom-ph); Quantum Physics (quant-ph)

We observe an inverse turbulent-wave cascade, from small to large lengthscales, in a homogeneous 2D Bose gas driven isotropically on a lengthscale much smaller than its size. Starting with an equilibrium condensed gas, at long drive times we observe a nonthermal steady state. At increasing lengthscales, starting from the forcing one, the steady-state momentum distribution features in turn: (i) a power-law spectrum, with an exponent close to the analytical result for a particle cascade in weak-wave turbulence, and (ii) a spectrum intriguingly reminiscent of a nonthermal fixed point associated with universal coarsening in an isolated 2D gas. In further experiments, based on anisotropic driving, we also reveal the qualitative picture of the cascade-formation dynamics.

Cross-lists for Fri, 3 May 24

[43]  arXiv:2405.00700 (cross-list from cs.NE) [pdf, ps, other]

Title: Oxygen vacancies modulated VO2 for neurons and Spiking Neural Network construction

Authors: Liang Li, Ting Zhou, Tong Liu, Zhiwei Liu, Yaping Li, Shuo Wu, Shanguang Zhao, Jinglin Zhu, Meiling Liu, Zhihan Lin, Bowen Sun, Jianjun Li, Fangwen Sun, Chongwen Zou

Comments: 18 pages,4 figures

Subjects: Neural and Evolutionary Computing (cs.NE); Strongly Correlated Electrons (cond-mat.str-el)

Artificial neuronal devices are the basic building blocks for neuromorphic computing systems, which have been motivated by realistic brain emulation. Aiming for these applications, various device concepts have been proposed to mimic the neuronal dynamics and functions. While till now, the artificial neuron devices with high efficiency, high stability and low power consumption are still far from practical application. Due to the special insulator-metal phase transition, Vanadium Dioxide (VO2) has been considered as an idea candidate for neuronal device fabrication. However, its intrinsic insulating state requires the VO2 neuronal device to be driven under large bias voltage, resulting in high power consumption and low frequency. Thus in the current study, we have addressed this challenge by preparing oxygen vacancies modulated VO2 film(VO2-x) and fabricating the VO2-x neuronal devices for Spiking Neural Networks (SNNs) construction. Results indicate the neuron devices can be operated under lower voltage with improved processing speed. The proposed VO2-x based back-propagation SNNs (BP-SNNs) system, trained with the MNIST dataset, demonstrates excellent accuracy in image recognition. Our study not only demonstrates the VO2-x based neurons and SNN system for practical application, but also offers an effective way to optimize the future neuromorphic computing systems by defect engineering strategy.

[44]  arXiv:2405.00765 (cross-list from quant-ph) [pdf, other]

Title: Schwinger-Keldysh nonequilibrium quantum field theory of open quantum systems beyond the Markovian regime: Application to the spin-boson model

Authors: Felipe Reyes-Osorio, Federico Garcia-Gaitan, David J. Strachan, Petr Plechac, Stephen R. Clark, Branislav K. Nikolic

Comments: 14 pages, 7 figures

Subjects: Quantum Physics (quant-ph); Strongly Correlated Electrons (cond-mat.str-el); High Energy Physics - Theory (hep-th); Mathematical Physics (math-ph)

We develop a Schwinger-Keldysh field theory (SKFT) for open quantum systems interacting with a dissipative environment and apply it to the spin-boson model as an archetypical example where the environment is composed of a bosonic bath. Prior SKFT developments of this type have been confined to the Markovian regime, as an alternative to a conventional description by the Lindblad quantum master equation (QME) which is a time-local matrix differential equation. Here we combine SKFT with a two-particle irreducible (2PI) action that resums a class of Feynman diagrams to infinite order. We obtain the time-evolution of the spin density matrix in the form of a system of integro-differential equations applicable to both Markovian and non-Markovian regimes. The latter regime--where taking into account memory effects becomes essential--poses a challenge for standard methods when trying to incorporate arbitrary properties of the system, bath, and length of time evolution. The SKFT+2PI-computed time evolution of the spin expectation values in the Markovian regime reproduces the solution of the Lindblad QME, as long as the system-bath coupling in the latter is adjusted by increasing it. In the non-Markovian regime, SKFT+2PI yields a nonperturbative solution that mimics results from both hierarchical equations of motion and tensor networks methods that we employ as benchmarks. Our SKFT+2PI approach can also access challenging cases, such as zero-temperature and sub-Ohmic bath, as well as arbitrary long evolution times. Taking into account favorable numerical cost of solving the integro-differential equations with increasing number of spins, time steps or dimensionality the SKFT+2PI approach offers a promising route for simulation of driven-dissipative systems in quantum computing or quantum magnonics and spintronics in the presence of a variety of (single or multiple) dissipative environments.

[45]  arXiv:2405.00786 (cross-list from quant-ph) [pdf, other]

Title: Thermalization slowing down of weakly nonintegrable quantum spin dynamics

Authors: Budhaditya Bhattacharjee, Alexei Andreanov, Sergej Flach

Subjects: Quantum Physics (quant-ph); Statistical Mechanics (cond-mat.stat-mech); Strongly Correlated Electrons (cond-mat.str-el)

We study thermalization slowing down of a quantum many-body system upon approach to two distinct integrability limits. Motivated by previous studies of classical systems, we identify two thermalization time scales: one quantum Lyapunov time scale is extracted by quantifying operator growth in time in an appropriately defined basis, while another ergodization time scale is related to statistics of fluctuations of the time-evolved operator around its mean value based on the eigenstate thermalization hypothesis. Using a paradigmatic Quantum Ising chain we find that both timescales diverge upon approach to integrability. The relative strength of the divergence of the scales depends on the particular integrable limit. This allows us to define two different universality classes of quantum thermalization: short- and long-range networks.

[46]  arXiv:2405.00805 (cross-list from quant-ph) [pdf, other]

Title: Classifying two-body Hamiltonians for Quantum Darwinism

Authors: Emery Doucet, Sebastian Deffner

Comments: 24 pages, 11 figures

Subjects: Quantum Physics (quant-ph); Statistical Mechanics (cond-mat.stat-mech)

Quantum Darwinism is a paradigm to understand how classically objective reality emerges from within a fundamentally quantum universe. Despite the growing attention that this field of research as been enjoying, it is currently not known what specific properties a given Hamiltonian describing a generic quantum system must have to allow the emergence of classicality. Therefore, in the present work, we consider a broadly applicable generic model of an arbitrary finite-dimensional system interacting with an environment formed from an arbitrary collection of finite-dimensional degrees of freedom via an unspecified, potentially time-dependent Hamiltonian containing at most two-body interaction terms. We show that such models support quantum Darwinism if the set of operators acting on the system which enter the Hamiltonian satisfy a set of commutation relations with a pointer observable and with one other. We demonstrate our results by analyzing a wide range of example systems: a qutrit interacting with a qubit environment, a qubit-qubit model with interactions alternating in time, and a series of collision models including a minimal model of a quantum Maxwell demon.

[47]  arXiv:2405.00873 (cross-list from quant-ph) [pdf, other]

Title: Implementing a synthetic magnetic vector potential in a 2D superconducting qubit array

Authors: Ilan T. Rosen, Sarah Muschinske, Cora N. Barrett, Arkya Chatterjee, Max Hays, Michael DeMarco, Amir Karamlou, David Rower, Rabindra Das, David K. Kim, Bethany M. Niedzielski, Meghan Schuldt, Kyle Serniak, Mollie E. Schwartz, Jonilyn L. Yoder, Jeffrey A. Grover, William D. Oliver

Comments: 9 pages, 5 figures, and Supplementary Information

Subjects: Quantum Physics (quant-ph); Mesoscale and Nanoscale Physics (cond-mat.mes-hall)

Superconducting quantum processors are a compelling platform for analog quantum simulation due to the precision control, fast operation, and site-resolved readout inherent to the hardware. Arrays of coupled superconducting qubits natively emulate the dynamics of interacting particles according to the Bose-Hubbard model. However, many interesting condensed-matter phenomena emerge only in the presence of electromagnetic fields. Here, we emulate the dynamics of charged particles in an electromagnetic field using a superconducting quantum simulator. We realize a broadly adjustable synthetic magnetic vector potential by applying continuous modulation tones to all qubits. We verify that the synthetic vector potential obeys requisite properties of electromagnetism: a spatially-varying vector potential breaks time-reversal symmetry and generates a gauge-invariant synthetic magnetic field, and a temporally-varying vector potential produces a synthetic electric field. We demonstrate that the Hall effect--the transverse deflection of a charged particle propagating in an electromagnetic field--exists in the presence of the synthetic electromagnetic field.

[48]  arXiv:2405.00971 (cross-list from physics.optics) [pdf, other]

Title: Excitation-Dependent Features and Artifacts in 2-D Terahertz Spectroscopy

Authors: Albert Liu, Ankit Disa

Subjects: Optics (physics.optics); Materials Science (cond-mat.mtrl-sci)

Recently, two-dimensional terahertz spectroscopy (2DTS) has attracted increasing attention for studying complex solids. A number of recent studies have applied 2DTS either with long pulses or away from any material resonances, situations that yield unconventional 2DTS spectra that are often difficult to interpret. Here, we clarify the generic origins of observed spectral features by examining 2DTS spectra of ZnTe, a model system with a featureless optical susceptibility at low terahertz frequencies. These results also reveal possible artifacts that may arise from electro-optic sampling in collinear 2DTS experiments, including the observation of spurious rectified or second harmonic signals.

[49]  arXiv:2405.01025 (cross-list from quant-ph) [pdf, ps, other]

Title: Density Matrix Realism

Authors: Eddy Keming Chen

Comments: 22 pages

Subjects: Quantum Physics (quant-ph); Statistical Mechanics (cond-mat.stat-mech); History and Philosophy of Physics (physics.hist-ph)

Realism about quantum theory naturally leads to realism about the quantum state of the universe. It leaves open whether it is a pure state represented by a wave function, or an impure one represented by a density matrix. I characterize and elaborate on Density Matrix Realism, the thesis that the universal quantum state is objective but can be impure. To clarify the thesis, I compare it with Wave Function Realism, explain the conditions under which they are empirically equivalent, consider two generalizations of Density Matrix Realism, and answer some frequently asked questions. I end by highlighting an implication for scientific realism.

[50]  arXiv:2405.01059 (cross-list from quant-ph) [pdf, ps, other]

Title: Dense dipole-dipole-coupled two-level systems in a thermal bath

Authors: Mihai A. Macovei

Comments: 6 pages, 4 figures

Subjects: Quantum Physics (quant-ph); Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Atomic and Molecular Clusters (physics.atm-clus)

The quantum dynamics of a dense and dipole-dipole coupled ensemble of two-level emitters interacting via their environmental thermostat is investigated. The static dipole-dipole interaction strengths are being considered strong enough but smaller than the transition frequency. Therefore, the established thermal equilibrium of ensemble's quantum dynamics is described with respect to the dipole-dipole coupling strengths. We have demonstrated the quantum nature of the spontaneously scattered light field in this process for weaker thermal baths as well as non-negligible dipole-dipole couplings compared to the emitter's transition frequency. Furthermore, the collectively emitted photon intensity suppresses or enhances depending on the environmental thermal baths intensities.

[51]  arXiv:2405.01244 (cross-list from cs.IT) [pdf, other]

Title: Stability of Information in the Heat Flow Clustering

Authors: Brian Weber

Subjects: Information Theory (cs.IT); Statistical Mechanics (cond-mat.stat-mech)

Clustering methods must be tailored to the dataset it operates on, as there is no objective or universal definition of ``cluster,'' but nevertheless arbitrariness in the clustering method must be minimized. This paper develops a quantitative ``stability'' method of determining clusters, where stable or persistent clustering signals are used to indicate real structures have been identified in the underlying dataset. This method is based on modulating clustering methods by controlling a parameter -- through a thermodynamic analogy, the modulation parameter is considered ``time'' and the evolving clustering methodologies can be considered a ``heat flow.'' When the information entropy of the heat flow is stable over a wide range of times -- either globally or in the local sense which we define -- we interpret this stability as an indication that essential features of the data have been found, and create clusters on this basis.

[52]  arXiv:2405.01253 (cross-list from hep-th) [pdf, other]

Title: 2d Ising Critical Couplings from Quantum Gravity

Authors: Valentin Bonzom, Etera R. Livine

Comments: 8 pages

Subjects: High Energy Physics - Theory (hep-th); Statistical Mechanics (cond-mat.stat-mech); Mathematical Physics (math-ph)

Using an exact holographic duality formula between the inhomogeneous 2d Ising model and 3d quantum gravity, we provide a formula for "real" zeroes of the 2d Ising partition function on finite graphs in terms of the geometry of a 2d triangulation embedded in the three-dimensional Euclidean space. The complex phase of those zeroes is given by the dihedral angles of the triangulation, which reflect its extrinsic curvature within the ambient 3d space, while the modulus is given by the angles within the 2d triangles, thus encoding the intrinsic geometry of the triangulation. Our formula can not cover the whole set of Ising zeroes, but we conjecture that a suitable complexification of these "real" zeroes would provide a more thorough formula. Nevertheless, in the thermodynamic limit, in the case of flat planar 2d triangulations, our Ising zeroes formula gives the critical couplings for isoradial graphs, confirming its generality. This approach shows an intricate, but precise, new relation between statistical mechanics and quantum geometry.

[53]  arXiv:2405.01377 (cross-list from physics.class-ph) [pdf, other]

Title: Nonlinearity-induced symmetry breaking in a system of two parametrically driven Kerr-Duffing oscillators

Authors: F. Hellbach, D. De Bernardis, M. Saur, I. Carusotto, W. Belzig, G. Rastelli

Subjects: Classical Physics (physics.class-ph); Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Optics (physics.optics)

We study the classical dynamics of a system of a pair of Kerr-Duffing nonlinear oscillators coupled by a nonlinear interaction and subject to a parametric drive. Within a rotating wave approximation (RWA), we analyze the steady-state solutions for the oscillation amplitude of the two oscillators. In the most relevant case of identical oscillators, we separately investigate configurations in which only one oscillator is parametrically driven, or both of them are simultaneously driven. In the latter regime, special attention is paid to the symmetric case where the parametric drives acting on the two oscillators are equal: for an increasing value of the detuning of the parametric drive, a transition to a multi-stable, symmetry-breaking regime is found, where the two oscillators display different oscillation amplitudes and phases.

Replacements for Fri, 3 May 24

[54]  arXiv:2302.09099 (replaced) [pdf, other]

Title: Universality and the thermoelectric transport properties of a double quantum dot system: Seeking for conditions that improve the thermoelectric efficiency

Authors: R. S. Cortes-Santamaria (1), J. A. Landazabal-Rodríguez (2), J.Silva-Valencia (1), E. Ramos (3), M. S. Figueira (4), R. Franco (1)

Comments: 13 pages, 12 figures

Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Materials Science (cond-mat.mtrl-sci); Strongly Correlated Electrons (cond-mat.str-el)

[55]  arXiv:2304.10468 (replaced) [pdf, other]

Title: Observation of chiral edge transport in a rapidly-rotating quantum gas

Authors: Ruixiao Yao, Sungjae Chi, Biswaroop Mukherjee, Airlia Shaffer, Martin Zwierlein, Richard J. Fletcher

Comments: 9 pages, 5+2 figures, v3 added a new figure

Subjects: Quantum Gases (cond-mat.quant-gas); Quantum Physics (quant-ph)

[56]  arXiv:2304.13442 (replaced) [pdf, other]

Title: Multi-module microwave assembly for fast read-out and charge noise characterization of silicon quantum dots

Authors: Felix-Ekkehard von Horstig, David J. Ibberson, Giovanni A. Oakes, Laurence Cochrane, David F. Wise, Nadia Stelmashenko, Sylvain Barraud, Jason A. W. Robinson, Frederico Martins, M. Fernando Gonzalez-Zalba

Comments: Main: 8 pages, 4 figures. Supplementary: 4 pages, 7 figures

Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Quantum Physics (quant-ph)

[57]  arXiv:2306.02162 (replaced) [pdf, ps, other]

Title: Critical behaviours of anisotropic XY ferromagnet in the presence of random field

Authors: Olivia Mallick, Muktish Acharyya

Comments: 12 pages Latex and 18 captioned eps figures

Journal-ref: J. Magn. Magn. Mater. (2024) 172084

Subjects: Statistical Mechanics (cond-mat.stat-mech)

[58]  arXiv:2306.09893 (replaced) [pdf, other]

Title: Density and current statistics in boundary-driven monitored fermionic chains

Authors: Xhek Turkeshi, Lorenzo Piroli, Marco Schirò

Comments: 10 pages, 6 figures; v3: minor revision

Subjects: Statistical Mechanics (cond-mat.stat-mech); Disordered Systems and Neural Networks (cond-mat.dis-nn); Quantum Physics (quant-ph)

[59]  arXiv:2307.04789 (replaced) [pdf, other]

Title: Anomalous Andreev Spectrum and Transport in Non-Hermitian Josephson Junctions

Authors: Chang-An Li, Hai-Peng Sun, Björn Trauzettel

Comments: 9 pages, 4 figures

Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)

[60]  arXiv:2307.04854 (replaced) [pdf, other]

Title: Unconventional quantum oscillations and evidence of non-trivial electronic states in quasi-two-dimensional electron system at complex oxide interfaces

Authors: Km Rubi, Denis R. Candido, Manish Dumen, Shengwei Zeng, Andrew Ammerlaan, Femke Bangma, Mun K. Chan, Michel Goiran, Ariando Ariando, Suvankar Chakraverty, Walter Escoffier, Uli Zeitler, Neil Harrison

Subjects: Materials Science (cond-mat.mtrl-sci); Mesoscale and Nanoscale Physics (cond-mat.mes-hall)

[61]  arXiv:2308.05788 (replaced) [pdf, other]

Title: Correlated electrons tunneling through pseudo Fermi arcs in hyperbolic Fermi surfaces of topological materials

Authors: Elena Derunova, Ángel David Ríos Ortiz

Comments: arXiv admin note: substantial text overlap with arXiv:2007.05525

Subjects: Strongly Correlated Electrons (cond-mat.str-el); Materials Science (cond-mat.mtrl-sci); Other Condensed Matter (cond-mat.other)

[62]  arXiv:2308.16241 (replaced) [pdf, other]

Title: Filling constraints on translation invariant dipole conserving systems

Authors: Fiona J. Burnell, Sanjay Moudgalya, Abhinav Prem

Comments: 5 pages + 11 pages. v2: Minor edits and added constraints for discrete charge and dipole conserving systems

Subjects: Strongly Correlated Electrons (cond-mat.str-el); Quantum Physics (quant-ph)

[63]  arXiv:2308.16908 (replaced) [pdf, other]

Title: Quantized thermal and spin transports of dirty planar topological superconductors

Authors: Sanjib Kumar Das, Bitan Roy

Comments: Published version in PRB: 13 pages, 4 figures, 1 Table

Journal-ref: Phys. Rev. B 109, 195403 (2024)

Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Disordered Systems and Neural Networks (cond-mat.dis-nn); Strongly Correlated Electrons (cond-mat.str-el); Superconductivity (cond-mat.supr-con)

[64]  arXiv:2309.00167 (replaced) [pdf, other]

Title: Phonon-Mediated Third-Harmonic Generation in Diamond

Authors: Jiaoyang Zheng, Guru Khalsa, Jeffrey Moses

Comments: 6 pages, 5 figures

Subjects: Optics (physics.optics); Materials Science (cond-mat.mtrl-sci)

[65]  arXiv:2309.04818 (replaced) [pdf, other]

Title: Graph topological transformations in space-filling cell aggregates

Authors: Tanmoy Sarkar, Matej Krajnc

Subjects: Soft Condensed Matter (cond-mat.soft); Biological Physics (physics.bio-ph); Computational Physics (physics.comp-ph)

[66]  arXiv:2309.06567 (replaced) [pdf, ps, other]

Title: Equilibrium with coordinate dependent diffusion: Comparison of different stochastic processes

Authors: A. Bhattacharyay

Comments: 6 pages, no figures

Subjects: Statistical Mechanics (cond-mat.stat-mech)

[67]  arXiv:2309.06765 (replaced) [pdf, other]

Title: Single-photon induced instabilities in a cavity electromechanical device

Authors: Tanmoy Bera, Mridul Kandpal, G. S. Agarwal, Vibhor Singh

Comments: Total 25 pages with 12 figures (6 Main, 6 Supplementary)

Subjects: Quantum Physics (quant-ph); Mesoscale and Nanoscale Physics (cond-mat.mes-hall)

[68]  arXiv:2309.12922 (replaced) [pdf, other]

Title: Thermodynamic Circuits I: Association of devices in stationary nonequilibrium

Authors: Paul Raux, Christophe Goupil, Gatien Verley

Comments: 12 pages, 3 figures

Subjects: Statistical Mechanics (cond-mat.stat-mech); Applied Physics (physics.app-ph)

[69]  arXiv:2309.14851 (replaced) [pdf, other]

Title: Doped Holographic Superconductors in Gubser-Rocha model

Authors: Ziyi Zhao, Wenhe Cai, Shuta Ishigaki

Comments: 17 pages,10 figures

Journal-ref: Commun. Theor. Phys. 76 045201(2024)

Subjects: High Energy Physics - Theory (hep-th); Strongly Correlated Electrons (cond-mat.str-el); Superconductivity (cond-mat.supr-con); General Relativity and Quantum Cosmology (gr-qc)

[70]  arXiv:2309.15846 (replaced) [pdf, ps, other]

Title: Revised Enskog equation for hard rods

Authors: Vir B. Bulchandani

Comments: v3: title updated, references added and revised for clarity. 8+3 pages

Journal-ref: J. Stat. Mech. (2024) 043205

Subjects: Statistical Mechanics (cond-mat.stat-mech)

[71]  arXiv:2310.02184 (replaced) [pdf, other]

Title: Electronic structure in a rare-earth based nodal-line semimetal candidate PrSbTe

Authors: Sabin Regmi, Iftakhar Bin Elius, Anup Pradhan Sakhya, Milo Sprague, Mazharul Islam Mondal, Nathan Valadez, Volodymyr Buturlim, Kali Booth, Tetiana Romanova, Krzysztof Gofryk, Andrzej Ptok, Dariusz Kaczorowski, Madhab Neupane

Comments: 26 pages, 11 figures; SUPPLEMENTAL MATERIAL included

Journal-ref: Phys. Rev. Materials 8, L041201 (2024)

Subjects: Materials Science (cond-mat.mtrl-sci); Mesoscale and Nanoscale Physics (cond-mat.mes-hall)

[72]  arXiv:2310.02683 (replaced) [pdf, other]

Title: Force renormalization for probes immersed in an active bath

Authors: Jeanine Shea, Gerhard Jung, Friederike Schmid

Journal-ref: Soft Matter, 2024, 20, 1767-1785

Subjects: Soft Condensed Matter (cond-mat.soft)

[73]  arXiv:2310.07978 (replaced) [pdf, other]

Title: Anderson localization transition in disordered hyperbolic lattices

Authors: Anffany Chen, Joseph Maciejko, Igor Boettcher

Comments: main text (5 pages with 3 figures) + bibliography (2 pages) + supplemental material (8 pages with 6 figures and 3 tables)

Subjects: Disordered Systems and Neural Networks (cond-mat.dis-nn); Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Statistical Mechanics (cond-mat.stat-mech); Strongly Correlated Electrons (cond-mat.str-el); Mathematical Physics (math-ph)

[74]  arXiv:2310.16204 (replaced) [pdf, other]

Title: Mass-based separation of active Brownian particles in an asymmetric channel

Authors: Narender Khatri

Comments: 14 pages, 5 figures

Journal-ref: Fluctuation and Noise Letters 2024, 2450047 (2024)

Subjects: Soft Condensed Matter (cond-mat.soft); Statistical Mechanics (cond-mat.stat-mech); Computational Physics (physics.comp-ph)

[75]  arXiv:2310.20005 (replaced) [pdf, ps, other]

Title: Connection between partial pressure, volatility, and the Soret effect elucidated using simulations of non-ideal supercritical fluid mixtures

Authors: Brandon Fields, Patrick K. Schelling

Comments: Submitted to J. Chem Physics

Journal-ref: Journal of Chemical Physics, 160 (8):084501 (2024)

Subjects: Soft Condensed Matter (cond-mat.soft)

[76]  arXiv:2311.06179 (replaced) [pdf, other]

Title: Cluster expansion by transfer learning for phase stability predictions

Authors: A. Dana, L. Mu, S. Gelin, S. B. Sinnott, I. Dabo

Subjects: Materials Science (cond-mat.mtrl-sci)

[77]  arXiv:2311.15495 (replaced) [pdf, ps, other]

Title: A Constructive Proof of the Spherical Parisi Formula

Authors: Brice Huang, Mark Sellke

Comments: 36 pages, 1 figure

Subjects: Probability (math.PR); Disordered Systems and Neural Networks (cond-mat.dis-nn); Mathematical Physics (math-ph)

[78]  arXiv:2311.15631 (replaced) [pdf, ps, other]

Title: Classification of connected étale algebras in pre-modular fusion categories up to rank three

Authors: Ken Kikuchi

Comments: 25 pages + 2 Appendices; v2: proved all $psu(2)_5$'s are completely anisotropic and fixed typos; v3: corrected method and typos, and completed classifications by relaxing assumption on multiplicity

Subjects: Quantum Algebra (math.QA); Strongly Correlated Electrons (cond-mat.str-el); High Energy Physics - Theory (hep-th); Mathematical Physics (math-ph); Category Theory (math.CT)

[79]  arXiv:2312.10886 (replaced) [pdf, other]

Title: Unconventional $s$-Wave Pairing with Point-Node-Like Gap Structure in UTe$_2$

Authors: Shingo Haruna, Takuji Nomura, Hirono Kaneyasu

Comments: Main Text: 4 pages, 7 figures; Supplementary Material: 7 pages, 4 figures. (Published; J. Phys. Soc. Jpn. 93, 063701)

Subjects: Superconductivity (cond-mat.supr-con); Strongly Correlated Electrons (cond-mat.str-el)

[80]  arXiv:2312.13353 (replaced) [pdf, ps, other]

Title: Classification of connected étale algebras in modular fusion categories up to rank five

Authors: Ken Kikuchi

Comments: 32 pages + references; v2: minor corrections on Toric Code, fixed typos; v3: minor corrections on $psu(2)_9$, and added a theorem in section 3.1 proving modular fusion categories $\mathcal B$'s with $\text{rank}(\mathcal B)>1$ are spontaneously broken; v4: minor corrections on $\text{Vec}_{\mathbb Z/2\mathbb Z\times\mathbb Z/2\mathbb Z}$; v5:corrected method and typos

Subjects: Quantum Algebra (math.QA); Strongly Correlated Electrons (cond-mat.str-el); High Energy Physics - Theory (hep-th); Mathematical Physics (math-ph); Category Theory (math.CT)

[81]  arXiv:2401.03028 (replaced) [pdf, other]

Title: Phase transitions and scale invariance in topological Anderson insulators

Authors: Bryan D. Assunção, Gerson J. Ferreira, Caio H. Lewenkopf

Comments: 7 pages, 4 figures, and a supplemental material with 7 pages, 4 figures

Journal-ref: Phys. Rev. B 109, L201102 (2024)

Subjects: Disordered Systems and Neural Networks (cond-mat.dis-nn); Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Materials Science (cond-mat.mtrl-sci)

[82]  arXiv:2401.15016 (replaced) [pdf, ps, other]

Title: KPZ fluctuations in finite volume

Authors: Sylvain Prolhac

Comments: Adapted from the habilitation thesis of the author. 99 pages, 25 figures, 605 references

Subjects: Probability (math.PR); Statistical Mechanics (cond-mat.stat-mech); Mathematical Physics (math-ph)

[83]  arXiv:2402.06214 (replaced) [pdf, other]

Title: First-Principles Study of Recombination-Enhanced Migration of an Interstitial Magnesium in Gallium Nitride

Authors: Yuansheng Zhao, Kenji Shiraishi, Tetsuo Narita, Atsushi Oshiyama

Subjects: Materials Science (cond-mat.mtrl-sci)

[84]  arXiv:2402.06760 (replaced) [pdf, other]

Title: Linear combinations of cluster mean-field states applied to spin systems

Authors: Athanasios Papastathopoulos-Katsaros, Thomas M. Henderson, Gustavo E. Scuseria

Subjects: Strongly Correlated Electrons (cond-mat.str-el); Chemical Physics (physics.chem-ph)

[85]  arXiv:2402.08730 (replaced) [pdf, other]

Title: Universal low-temperature fluctuation of unconventional superconductors revealed: 'Smoking gun' leaves proper bosonic superfluidity the last theory standing

Authors: Anthony Hegg, Ruoshi Jiang, Jie Wang, Jinning Hou, Tao Zeng, Yucel Yildirim, Wei Ku

Subjects: Superconductivity (cond-mat.supr-con); Strongly Correlated Electrons (cond-mat.str-el)

[86]  arXiv:2402.13892 (replaced) [pdf, other]

Title: Variational Umbrella Seeding for Calculating Nucleation Barriers

Authors: Willem Gispen, Jorge R. Espinosa, Eduardo Sanz, Carlos Vega, Marjolein Dijkstra

Journal-ref: J. Chem. Phys. 160, 174501 (2024)

Subjects: Soft Condensed Matter (cond-mat.soft)

[87]  arXiv:2402.14107 (replaced) [pdf, other]

Title: Excitation Spectrum and Spin Hamiltonian of the Frustrated Quantum Ising Magnet Pr$_3$BWO$_9$

Authors: J. Nagl, D. Flavián, S. Hayashida, K. Yu. Povarov, M. Yan, N. Murai, S. Ohira-Kawamura, G. Simutis, T. J. Hicken, H. Luetkens, C. Baines, A. Hauspurg, B. V. Schwarze, F. Husstedt, V. Pomjakushin, T. Fennell, Z. Yan, S. Gvasaliya, A. Zheludev

Comments: 21 pages, 12 figures

Subjects: Strongly Correlated Electrons (cond-mat.str-el)

[88]  arXiv:2402.15209 (replaced) [pdf, other]

Title: (Almost) Everything is a Dicke model -- Mapping non-superradiant correlated light-matter systems to the exactly solvable Dicke model

Authors: Andreas Schellenberger, Kai Phillip Schmidt

Comments: 26 pages, 7 figures; Added proposed changes by the editors during SciPost review process

Subjects: Strongly Correlated Electrons (cond-mat.str-el); Quantum Physics (quant-ph)

[89]  arXiv:2402.16685 (replaced) [pdf, other]

Title: Rapidly convergent quantum Monte Carlo using a Chebyshev projector

Authors: Zijun Zhao, Maria-Andreea Filip, Alex J W Thom

Comments: 12 pages, 13 figures

Subjects: Strongly Correlated Electrons (cond-mat.str-el); Chemical Physics (physics.chem-ph)

[90]  arXiv:2403.00052 (replaced) [pdf, other]

Title: Long-lived Topological Flatband Excitons in Semiconductor Moiré Heterostructures: a Bosonic Kane-Mele Model Platform

Authors: Ming Xie, Mohammad Hafezi, Sankar Das Sarma

Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)

[91]  arXiv:2404.02863 (replaced) [pdf, ps, other]

Title: Discovery of universal phonon thermal Hall effect in crystals

Authors: Xiaobo Jin, Xu Zhang, Wenbo Wan, Hanru Wang, Yihan Jiao, Shiyan Li

Comments: 33 pages

Subjects: Strongly Correlated Electrons (cond-mat.str-el); Materials Science (cond-mat.mtrl-sci); Superconductivity (cond-mat.supr-con)

[92]  arXiv:2404.07796 (replaced) [pdf, other]

Title: Point defects in CdTe and CdTeSe alloy: a first principles investigation with DFT+U

Authors: Xiaofeng Xiang, Yijun Tong, Aaron Gehrke, Scott Dunham

Comments: 10 pages, 23 figures

Subjects: Materials Science (cond-mat.mtrl-sci)

[93]  arXiv:2404.10727 (replaced) [pdf, other]

Title: How Deep Networks Learn Sparse and Hierarchical Data: the Sparse Random Hierarchy Model

Authors: Umberto Tomasini, Matthieu Wyart

Comments: 9 pages, 6 figures

Subjects: Machine Learning (stat.ML); Disordered Systems and Neural Networks (cond-mat.dis-nn); Machine Learning (cs.LG)

[94]  arXiv:2404.10814 (replaced) [pdf, other]

Title: Higher Hall conductivity from a single wave function: Obstructions to symmetry-preserving gapped edge of (2+1)D topological order

Authors: Ryohei Kobayashi, Taige Wang, Tomohiro Soejima, Roger S. K. Mong, Shinsei Ryu

Comments: 17 pages, 4 figures, minor edits

Subjects: Strongly Correlated Electrons (cond-mat.str-el); Mesoscale and Nanoscale Physics (cond-mat.mes-hall); High Energy Physics - Theory (hep-th); Quantum Physics (quant-ph)

[95]  arXiv:2404.14598 (replaced) [pdf, ps, other]

Title: Dynamic Nanodomains Dictate Macroscopic Properties in Lead Halide Perovskites

Authors: Milos Dubajic, James R. Neilson, Johan Klarbring, Xia Liang, Stephanie A. Boer, Kirrily C. Rule, Josie E. Auckett, Leilei Gu, Xuguang Jia, Andreas Pusch, Ganbaatar Tumen-Ulzii, Qiyuan Wu, Thomas A. Selby, Yang Lu, Julia C. Trowbridge, Eve M. Mozur, Arianna Minelli, Nikolaj Roth, Kieran W. P. Orr, Arman Mahboubi Soufiani, Simon Kahmann, Irina Kabakova, Jianning Ding, Tom Wu, Gavin J.Conibeer, Stephen P. Bremner, Aron Walsh, Michael P. Nielsen, Samuel D. Stranks

Comments: Main text and supplementary information. Main text 16 pages, 4 figures. Supplementary information 42 pages, 36 figures

Subjects: Materials Science (cond-mat.mtrl-sci)

[96]  arXiv:2404.16990 (replaced) [pdf, other]

Title: Record Acceleration of the Two-Dimensional Ising Model Using High-Performance Wafer Scale Engine

Authors: Dirk Van Essendelft, Hayl Almolyki, Wei Shi, Terry Jordan, Mei-Yu Wang, Wissam A. Saidi

Comments: 13 pages, 5 figures, plus supplementary information

Subjects: Hardware Architecture (cs.AR); Materials Science (cond-mat.mtrl-sci)

[97]  arXiv:2404.18737 (replaced) [pdf, other]

Title: A general framework for active space embedding methods: applications in quantum computing

Authors: Stefano Battaglia, Max Rossmannek, Vladimir V. Rybkin, Ivano Tavernelli, Jürg Hutter

Subjects: Chemical Physics (physics.chem-ph); Materials Science (cond-mat.mtrl-sci); Strongly Correlated Electrons (cond-mat.str-el); Quantum Physics (quant-ph)

[98]  arXiv:2404.19153 (replaced) [pdf, other]

Title: Room temperature realization of artificial chiral magnets with reprogrammable magnon nonreciprocity at zero field

Authors: Mingran Xu, Axel J. M. Deenen, Huixin Guo, Dirk Grundler

Subjects: Materials Science (cond-mat.mtrl-sci); Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Applied Physics (physics.app-ph)

[99]  arXiv:2404.19756 (replaced) [pdf, other]

Title: KAN: Kolmogorov-Arnold Networks

Authors: Ziming Liu, Yixuan Wang, Sachin Vaidya, Fabian Ruehle, James Halverson, Marin Soljačić, Thomas Y. Hou, Max Tegmark

Comments: 48 pages, 20 figures. Codes are available at this https URL

Subjects: Machine Learning (cs.LG); Disordered Systems and Neural Networks (cond-mat.dis-nn); Artificial Intelligence (cs.AI); Machine Learning (stat.ML)

[100]  arXiv:2405.00178 (replaced) [pdf, ps, other]

Title: Quantum Entanglement In Mixed-Spin Trimmer: Effects of A Magnetic Field And Heterogeneous g-Factors

Authors: Zhirayr Adamyan, Vadim Ohanyan

Comments: 13 pages, 19 figures

Subjects: Statistical Mechanics (cond-mat.stat-mech)

[101]  arXiv:2405.00590 (replaced) [pdf, other]

Title: Nonlinear Poisson effect in affine semiflexible polymer networks

Authors: Jordan L. Shivers, Fred C. MacKintosh

Subjects: Soft Condensed Matter (cond-mat.soft); Statistical Mechanics (cond-mat.stat-mech); Biological Physics (physics.bio-ph)

[102]  arXiv:2405.00609 (replaced) [pdf, ps, other]

Title: Capillary-Assisted Printing of Droplets at a Solid-Like Liquid-Liquid Interface

Authors: Anshu Thapa, Robert Malinowski, Matthew O. Blunt, Giorgio Volpe, Joe Forth

Comments: 14 pages, 5 figures, 7 supplementary figures

Subjects: Soft Condensed Matter (cond-mat.soft)

• New submissions
• Cross-lists
• Replacements