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Quantum Physics

Title: Hamiltonian simulation of minimal holographic sparsified SYK model

Authors: Raghav G. Jha
Abstract: The circuit complexity for Hamiltonian simulation of the sparsified SYK model with $N$ Majorana fermions and $q=4$ (quartic interactions) which retains holographic features (referred to as `minimal holographic sparsified SYK') with $k\ll N^{3}/24$ (where $k$ is the total number of interaction terms times 1/$N$) using second-order Trotter method and Jordan-Wigner encoding is found to be $\widetilde{\mathcal{O}}(k^{p}N^{3/2} \log N (\mathcal{J}t)^{3/2}\varepsilon^{-1/2})$ where $t$ is the simulation time, $\varepsilon$ is the desired error in the implementation of the unitary $U = \exp(-iHt)$, $\mathcal{J}$ is the disorder strength, and $p < 1$. This complexity implies that with less than a hundred logical qubits and about $10^{6}$ gates, it will be possible to achieve an advantage in this model and simulate real-time dynamics up to scrambling time.
Comments: v2: Gate costs for up to 125 qubit-Hamiltonian i.e., N=250. 7 pages. Added few references, refined text. Comments welcome
Subjects: Quantum Physics (quant-ph); High Energy Physics - Lattice (hep-lat); High Energy Physics - Theory (hep-th)
Report number: JLAB-THY-24-4027
Cite as: arXiv:2404.14784 [quant-ph]
  (or arXiv:2404.14784v2 [quant-ph] for this version)

Submission history

From: Raghav Govind Jha [view email]
[v1] Tue, 23 Apr 2024 06:49:34 GMT (86kb,D)
[v2] Thu, 9 May 2024 10:29:33 GMT (83kb,D)

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