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Observation of many-body localization of interacting fermions in a quasi-random optical lattice

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arxiv 1501.05661 v1 pith:P4XETF33 submitted 2015-01-22 cond-mat.quant-gas cond-mat.dis-nncond-mat.str-elquant-ph

classification cond-mat.quant-gascond-mat.dis-nncond-mat.str-elquant-ph
keywords localizationmany-bodydisorderordercriticaldensitydependencefermions
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We experimentally observe many-body localization of interacting fermions in a one-dimensional quasi-random optical lattice. We identify the many-body localization transition through the relaxation dynamics of an initially-prepared charge density wave. For sufficiently weak disorder the time evolution appears ergodic and thermalizing, erasing all remnants of the initial order. In contrast, above a critical disorder strength a significant portion of the initial ordering persists, thereby serving as an effective order parameter for localization. The stationary density wave order and the critical disorder value show a distinctive dependence on the interaction strength, in agreement with numerical simulations. We connect this dependence to the ubiquitous logarithmic growth of entanglement entropy characterizing the generic many-body localized phase.

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Cited by 2 Pith papers

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  1. Many-Body Physics from Spin-Phonon Coupling in Rydberg Atom Arrays

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    Spin-phonon coupling from atomic vibrations in Rydberg arrays induces three-spin interactions that stabilize a new Z3 phase and suppress quantum scar thermalization.

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    quant-ph 2025-01 conditional novelty 5.0 of 10

    Extreme value statistics of Schmidt eigenvalues reveal deviations from Wishart behavior in ergodic eigenstates of ultrametric random matrices and the Quantum Sun model.

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