Particle fluctuations and the failure of simple effective models for many-body localized phases
Maximilian Kiefer-Emmanouilidis,
Razmik Unanyan,
Michael Fleischhauer
et al.
Abstract:We investigate and compare the particle number fluctuations in the putative many-body localized (MBL) phase of a spinless fermion model with potential disorder and nearest-neighbor interactions with those in the non-interacting case (Anderson localization) and in effective models where only interaction terms diagonal in the Anderson basis are kept. We demonstrate that these types of simple effective models cannot account for the particle number fluctuations observed in the MBL phase of the microscopic model. T… Show more
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