Coupling Identical one-dimensional Many-Body Localized Systems.
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Peer-reviewed
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Abstract
We experimentally study the effects of coupling one-dimensional many-body localized systems with identical disorder. Using a gas of ultracold fermions in an optical lattice, we artificially prepare an initial charge density wave in an array of 1D tubes with quasirandom on-site disorder and monitor the subsequent dynamics over several thousand tunneling times. We find a strikingly different behavior between many-body localization and Anderson localization. While the noninteracting Anderson case remains localized, in the interacting case any coupling between the tubes leads to a delocalization of the entire system.
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Keywords
cond-mat.quant-gas, cond-mat.quant-gas, cond-mat.dis-nn, cond-mat.stat-mech, cond-mat.str-el, quant-ph
Journal Title
Phys Rev Lett
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Journal ISSN
0031-9007
1079-7114
1079-7114
Volume Title
116
Publisher
American Physical Society (APS)
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Sponsorship
We acknowledge financial support by the European Commision (UQUAM, AQuS) and the Nanosystems Initiative Munich (NIM).