A supercritical superfluid and vortex unbinding following a quantum quench
Quantum Gases
2013-05-29 v2
Abstract
We study the dynamics of the relative phase of a bilayer of two-dimensional superfluids after the two superfluids have been decoupled, using truncated Wigner approximation. On short time scales the relative phase shows "light cone" like thermalization and creates a metastable superfluid state, which can be supercritical. On longer time scales this state relaxes to a disordered state due to dynamical vortex unbinding. This scenario of dynamically suppressed vortex proliferation constitutes a {\it reverse-Kibble-Zurek effect}. We observe dynamics of creation of vortex anti-vortex pairs and their consequent motion. Our predictions can be directly measured in interference experiments, see Ref 1.
Cite
@article{arxiv.0904.2881,
title = {A supercritical superfluid and vortex unbinding following a quantum quench},
author = {L. Mathey and A. Polkovnikov},
journal= {arXiv preprint arXiv:0904.2881},
year = {2013}
}
Comments
4 pages, 5 figures