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The authors consider the phenomena of quantum revivals in a system exhibiting many-body localization. To this end the authors study a qubit attached to a disordered insulator. Without interactions, the qubit undergoes revivals at a rate that approaches a constant as time goes to infinity. If interactions are added to the insulator, this rate sees instead a logarithmic suppression in time. This logarithmic behavior is related to the same mechanism that underpins the logarithmic growth in entanglement entropy after a quantum quench in a many-body localized system.
Vasseur et al. (Mon,) studied this question.
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