非厄米wanner - stark梯系的动态moir样图案

IF 3 3区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Annals of Physics Pub Date : 2025-05-04 DOI:10.1016/j.aop.2025.170049

H.P. Zhang, Z. Song

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引用次数: 0

摘要

本文研究了具有位置相关实势的非厄米Su-Schrieffer-Heeger链的非厄米Wannier-Stark阶梯系统的动力学行为。在存在线性外场的情况下，我们采用了非厄米Floquet方法，发现能级对场很敏感。该系统表现出两种截然不同的动态行为，这两种行为被一个特殊点分隔开：一种发生在与两个真实wanner - stark梯相关联的PT对称区，另一种发生在与复共轭梯相关联的PT对称破断区。作为两个区域的边界，两个梯子合并成一个梯子。在非线性场的情况下，这两个不同的区域在链上交替出现，表现出动态的莫伊兰样模式。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Dynamic Moiré-like pattern in non-Hermitian Wannier–Stark ladder system

We study the dynamical behavior of the non-Hermitian Wannier–Stark ladder system, which is a non-Hermitian Su–Schrieffer–Heeger chain with a position-dependent real potential. In the presence of a linear external field, we employ the non-Hermitian Floquet method and find that the energy levels are sensitive to the field. The system exhibits two distinct dynamic behaviors separated by an exceptional point: one in the

PT

symmetrical region associated with two real Wannier–Stark ladders, and another in the

PT

symmetry-breaking region associated with complex conjugate ladders. As the boundary between the two regions, two ladders coalesce into a single ladder. In the case of a non-linear field, these two distinct regions appear alternately along the chain, exhibiting dynamic Moiré-like patterns.

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来源期刊

Annals of Physics 物理-物理：综合

CiteScore

5.30

自引率

3.30%

发文量

211

审稿时长

47 days

期刊介绍： Annals of Physics presents original work in all areas of basic theoretic physics research. Ideas are developed and fully explored, and thorough treatment is given to first principles and ultimate applications. Annals of Physics emphasizes clarity and intelligibility in the articles it publishes, thus making them as accessible as possible. Readers familiar with recent developments in the field are provided with sufficient detail and background to follow the arguments and understand their significance. The Editors of the journal cover all fields of theoretical physics. Articles published in the journal are typically longer than 20 pages.