Phenomenology of many-body localization in bond-disordered spin chains

• URL: http://arxiv.org/abs/2405.10062v2
• Date: Tue, 11 Feb 2025 13:55:42 GMT
• Title: Phenomenology of many-body localization in bond-disordered spin chains
• Authors: Adith Sai Aramthottil, Piotr Sierant, Maciej Lewenstein, Jakub Zakrzewski,
• Abstract summary: Many-body localization hinders the thermalization of quantum many-body systems in the presence of strong disorder. In this work, we study the MBL regime in bond-disordered spin-1/2 XXZ spin chain.
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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 work, 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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