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arXiv · 2505.22319

Localization behavior in a Hermitian and non-Hermitian Raman lattice

Entong Zhao·Yu-Jun Liu·Ka Kwan Pak·Peng Ren·Mengbo Guo·Chengdong He·Gyu-Boong Jo
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Abstract

We propose a flexible Raman lattice system for alkaline-earth-like atoms to theoretically investigate localization behaviors in a quasi-periodic lattice with controllable non-Hermiticity. Our analysis demonstrates that critical phases and mobility edges can arise by adjusting spin-dependence of the incommensurate potentials in the Hermitian regime. With non-Hermiticity introduced by spin-selective atom loss, our calculations reveal that critical localization behaviour in this system can be suppressed by dissipation. Our work provides insights into interplay between quasi-periodicity and non-Hermitian physics, offering a new perspective on localization phenomena.

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Entong Zhao, Yu-Jun Liu, Ka Kwan Pak, Peng Ren, Mengbo Guo, Chengdong He, Gyu-Boong Jo. 2025-05-28. Localization behavior in a Hermitian and non-Hermitian Raman lattice. https://arxiv.org/abs/2505.22319

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