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Topological Quantum Computing Open Quantum Systems Decoherence Quantum Simulation

Localization persisting under aperiodic driving

arXiv

Authors: Hongzheng Zhao, Florian Mintert, Johannes Knolle, Roderich Moessner

Year

2021

Paper ID

41257

Status

Preprint

Abstract Read

~2 min

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Abstract

Localization may survive in periodically driven (Floquet) quantum systems, but is generally unstable for aperiodic drives. In this work, we identify a hidden conservation law originating from a chiral symmetry in a disordered spin-1/2 XX chain. This protects indefinitely long-lived localization for general--even aperiodic--drives. Therefore, rather counter-intuitively, adding further potential disorder which spoils the conservation law delocalizes the system, via a controllable parametrically long-lived prethermal regime. This provides a first example of persistent single-particle `localization without eigenstates'.

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Localization may survive in periodically driven (Floquet) quantum systems, but is generally unstable for aperiodic drives.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2111.13558 [2] arXiv https://arxiv.org/abs/2111.13558 [3] Publisher https://arxiv.org/abs/2111.13558

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