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Condensed Matter > Quantum Gases
Title: Lattice Polaron in a Bose-Einstein Condensate of Hard-Core Bosons
(Submitted on 20 Mar 2024 (v1), last revised 22 Mar 2024 (this version, v2))
Abstract: Lattice polarons, quasiparticles arising from the interaction between an impurity and its surrounding bosonic environment confined to a lattice system, have emerged as a platform for generating complex few-body states, probing many-body phenomena, and addressing long-standing problems in physics. In this study, we employ a variational ansatz to investigate the quasiparticle and spectral properties of an impurity coupled to a condensate gas of hard-core bosons in a two-dimensional optical lattice. Our findings demonstrate that the polaron features can be tuned by adjusting the filling factor of the bath, revealing intriguing polaron characteristics in the strongly interacting regime. These results offer valuable insights for lattice polaron experiments with ultracold gases and can serve as a guide for new experiments in emergent quantum devices, such as moir\'e materials, where optical excitations can be described in terms of hard-core bosons.
Submission history
From: Arturo Camacho-Guardian Dr. [view email][v1] Wed, 20 Mar 2024 14:34:59 GMT (1400kb,D)
[v2] Fri, 22 Mar 2024 19:46:49 GMT (1401kb,D)
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