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Supercurrent Survival under a Rosen-Zener Quench of Hard-Core Bosons

Klich, I. and Lannert, C. and Refael, G. (2007) Supercurrent Survival under a Rosen-Zener Quench of Hard-Core Bosons. Physical Review Letters, 99 (20). Art. No. 205303. ISSN 0031-9007. doi:10.1103/PhysRevLett.99.205303.

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We study the survival of supercurrents in a system of impenetrable bosons on a lattice, subject to a quantum quench from its critical superfluid phase to an insulating phase. We show that the evolution of the current when the quench follows a Rosen-Zener profile is exactly solvable. This allows us to analyze a quench of arbitrary rate, from a sudden destruction of the superfluid to a slow opening of a gap. The decay and oscillations of the current are analytically derived and studied numerically along with the momentum distribution after the quench. In the case of small supercurrent boosts nu, we find that the current surviving at long times is proportional to nu^3.

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Additional Information:©2007 The American Physical Society. (Received 29 June 2007; published 16 November 2007) We would like to thank R. Santachiara and S. Powell for discussions.
Issue or Number:20
Record Number:CaltechAUTHORS:KLIprl07
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9195
Deposited By: Archive Administrator
Deposited On:20 Nov 2007
Last Modified:08 Nov 2021 20:57

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