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Title:

Anomalous Diffusion and Griffiths Effects Near the Many-Body Localization Transition

Document type:
Zeitschriftenaufsatz
Author(s):
Agarwal, Kartiek; Gopalakrishnan, Sarang; Knap, Michael; Müller, Markus; Demler, Eugene
Abstract:
We explore the high-temperature dynamics of the disordered, one-dimensional XXZ model near the many-body localization (MBL) transition, focusing on the delocalized (i.e., “metallic”) phase. In the vicinity of the transition, we find that this phase has the following properties: (i) local magnetization fluctuations relax subdiffusively; (ii) the ac conductivity vanishes near zero frequency as a power law; and (iii) the distribution of resistivities becomes increasingly broad at low frequencies,...     »
Journal title:
Physical Review Letters 2015-04
Year:
2015
Journal volume:
114
Journal issue:
16
Fulltext / DOI:
doi:10.1103/physrevlett.114.160401
Publisher:
American Physical Society (APS)
E-ISSN:
0031-90071079-7114
Date of publication:
23.04.2015
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