TODAY - CMT Seminar - Chris Laumann, University of Washington, Monday, April 27th, 11:30am, 4138 PRB

[Longbrake, Patricia]

Please join us TODAY, Monday, April 27th at 11:30am for the Condensed Matter Theory Seminar presented by Chris Laumann, University of Washington in room 4138 PRB.

"Many-body localization and high temperature mobility edges"

Abstract:  Statistical mechanics is the framework that connects thermodynamics to the microscopic world. It hinges on the assumption of equilibration. Isolated quantum systems need not equilibrate; one example is given by the phenomenon known as many-body localization. The many-body localized phase constitutes the ultimate quantum glass. It transports neither heat nor charge; may possess orders disallowed in equilibrium by Peierls-Mermin-Wagner arguments; and, may exhibit coherent localized degrees of freedom even at high energy.
In this talk, I will briefly introduce the basic phenomena of many-body localization and review its theoretical and experimental status. I will then focus on the question of the existence of a finite energy density mobility edge. I will show that such a transition arises in the dynamics of a mean-field quantum glass model, the quantum random energy model, and then turn to the evidence for a similar transition in one dimensional spin chains.

References:
CRL, A. Pal, A. Scardicchio, PRL 113, 200405 (2014)
I. Mondragon-Shem, A. Pal, T. Hughes, CRL, arXiv:1501.03824

Thank you,
Trisch
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