Phenomenology of Many-Body Localization in Bond-Disordered Spin Chains

IF 8.1 1区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY Physical review letters Pub Date : 2024-11-08 DOI:10.1103/physrevlett.133.196302

Adith Sai Aramthottil, Piotr Sierant, Maciej Lewenstein, Jakub Zakrzewski

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Abstract

Many-body localization (MBL) hinders the thermalization of quantum many-body systems in the presence of strong disorder. In this Letter, we study the MBL regime in bond-disordered spin-

1 / 2

XXZ spin chain, finding the multimodal distribution of entanglement entropy in eigenstates, sub-Poissonian level statistics, and revealing a relation between operators and initial states required for examining the breakdown of thermalization in the time evolution of the system. We employ a real space renormalization group scheme to identify these phenomenological features of the MBL regime that extend beyond the standard picture of local integrals of motion relevant for systems with disorder coupled to on-site operators. Our results pave the way for experimental probing of MBL in bond-disordered spin chains.

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邦德无序自旋链中的多体定位现象学

多体局域化（MBL）阻碍了存在强无序的量子多体系统的热化。在这封信中，我们研究了键无序自旋-1/2 XXZ 自旋链中的 MBL 体系，发现了纠缠熵在特征状态中的多模态分布、亚泊松比级统计量，并揭示了研究系统时间演化中热化分解所需的算子与初始态之间的关系。我们采用实空间重正化群方案来识别 MBL 体系的这些现象学特征，这些特征超越了与现场算子耦合的无序系统相关的局部运动积分的标准图景。我们的结果为实验探测键无序自旋链中的 MBL 铺平了道路。

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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来源期刊

Physical review letters 物理-物理：综合

CiteScore

16.50

自引率

7.00%

发文量

2673

审稿时长

2.2 months

期刊介绍： Physical review letters(PRL)covers the full range of applied, fundamental, and interdisciplinary physics research topics: General physics, including statistical and quantum mechanics and quantum information Gravitation, astrophysics, and cosmology Elementary particles and fields Nuclear physics Atomic, molecular, and optical physics Nonlinear dynamics, fluid dynamics, and classical optics Plasma and beam physics Condensed matter and materials physics Polymers, soft matter, biological, climate and interdisciplinary physics, including networks