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

Authors

I. Klich, California Institute of Technology
Courtney Lannert, Wellesley CollegeFollow
G. Refael, California Institute of Technology

Document Type

Article

Publication Date

11-16-2007

Publication Title

Physical Review Letters

Abstract

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 ν, we find that the current surviving at long times is proportional to ν3.

Volume

99

Issue

20

DOI

10.1103/PhysRevLett.99.205303

ISSN

00319007

Rights

© 2007 The American Physical Society

Comments

Archived as published.

Recommended Citation

Klich, I.; Lannert, Courtney; and Refael, G., "Supercurrent Survival under a Rosen-Zener Quench of Hard-Core Bosons" (2007). Physics: Faculty Publications, Smith College, Northampton, MA.
https://scholarworks.smith.edu/phy_facpubs/67