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Transition to a many-body localized regime in a two-dimensional disordered quantum dimer model

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arxiv 1902.04091 v2 pith:3LW6BPY3 submitted 2019-02-11 cond-mat.dis-nn cond-mat.stat-mech

classification cond-mat.dis-nncond-mat.stat-mech
keywords many-bodyquantumlocalizedtransitiondimensiondimerdisorderinteractions
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Many-body localization is a unique physical phenomenon driven by interactions and disorder for which a quantum system can evade thermalization. While the existence of a many-body localized phase is now well-established in one-dimensional systems, its fate in higher dimension is an open question. We present evidence for the occurrence of a transition to a many-body localized regime in a two-dimensional quantum dimer model with interactions and disorder. Our analysis is based on the results of large-scale simulations for static and dynamical properties of a consequent number of observables. Our results pave the way for a generic understanding of occurrence of a many-body localization transition in dimension larger than one, and highlight the unusual quantum dynamics that can be present in constrained systems.

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  1. Classification of symmetry-protected topological phases in two-dimensional many body-localized systems

    cond-mat.dis-nn 2019-08 conditional novelty 6.0 of 10

    Two-dimensional many-body-localized systems with an on-site abelian symmetry are shown to carry a topological index in the (generalized) third cohomology group of the symmetry group, robust to local perturbations.

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