Actions for Quench from Mott Insulator to Superfluid [electronic resource].

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Quench from Mott Insulator to Superfluid [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2012.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Additional Creators
Los Alamos National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
We study a linear ramp of the nearest-neighbor tunneling rate in the Bose-Hubbard model driving the system from the Mott insulator state into the superfluid phase. We employ the truncated Wigner approximation to simulate linear quenches of a uniform system in 1...3 dimensions, and in a harmonic trap in 3 dimensions. In all these setups the excitation energy decays like one over third root of the quench time. The -1/3 scaling is explained by an impulse-adiabatic approximation - a variant of the Kibble-Zurek mechanism - describing a crossover from non-adiabatic to adiabatic evolution when the system begins to keep pace with the increasing tunneling rate.
Report Numbers
E 1.99:la-ur-12-21841
la-ur-12-21841
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Note
Published through SciTech Connect.
06/01/2012.
"la-ur-12-21841"
Zurek, Wojciech H.; Dziarmaga, Jacek; Tylutki, Marek.
Funding Information
AC52-06NA25396
View MARC record | catkey: 13804798