通过反PT对称虚耦合的可调谐Aharonov-Bohm笼

IF 2.6 2区物理与天体物理 Q2 OPTICS

Physical Review a Pub Date : 2023-08-21 DOI:10.1103/PhysRevA.108.023518

S. M. Zhang, H. Xu, L. Jin

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引用次数: 0

摘要

Aharonov-Bohm（AB）笼实现了对任意激发的非衍射传播的局部约束。在这项研究中，我们在广义Creutz梯形中引入了一种反奇偶时间（anti-$\mathcal{PT}$）对称虚耦合，以构造具有可调平带能量的非埃尔米特AB笼。我们研究了紧致局域化态和完全局域化动力学，并表明非埃尔米特性影响了AB笼动力学的局域化概率分布，并增加了其振荡周期。AB笼解耦核心的非埃尔米特工程是我们建议的要点。我们的方法广泛适用于更普遍的情况，并且可以促进物理中定位的操作。

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Tunable Aharonov-Bohm cages through anti-PT-symmetric imaginary couplings

The Aharonov-Bohm (AB) cage enables localized confinement with nondiffractive propagation for arbitrary excitation. In this study, we introduce an anti-parity-time (anti-$\mathcal{PT}$) symmetric imaginary coupling in a generalized Creutz ladder to construct a non-Hermitian AB cage with tunable flat-band energy. We investigate compact localized states and complete localization dynamics, and show that non-Hermiticity affects the localization probability distributions and increases the oscillation period of the AB cage dynamics. Non-Hermitian engineering of the decoupled core of the AB cage is the essential point in our proposal. Our approach is widely applicable to a more general situation and can facilitate the manipulation of localization in physics.

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来源期刊

Physical Review a OPTICSPHYSICS, ATOMIC, MOLECULAR & CHEMICA-PHYSICS, ATOMIC, MOLECULAR & CHEMICAL

CiteScore

5.30

自引率

24.10%

发文量

2086

期刊介绍： Physical Review A (PRA) publishes important developments in the rapidly evolving areas of atomic, molecular, and optical (AMO) physics, quantum information, and related fundamental concepts. PRA covers atomic, molecular, and optical physics, foundations of quantum mechanics, and quantum information, including: -Fundamental concepts -Quantum information -Atomic and molecular structure and dynamics; high-precision measurement -Atomic and molecular collisions and interactions -Atomic and molecular processes in external fields, including interactions with strong fields and short pulses -Matter waves and collective properties of cold atoms and molecules -Quantum optics, physics of lasers, nonlinear optics, and classical optics