Non-equilibrium coherence dynamics of a soft boson lattice
其他凝聚态物理
2009-11-11 v2 量子物理
摘要
We study the non-equilibrium evolution of the phase coherence of a Bose-Einstein condensate (BEC) in a one dimensional optical lattice, as the lattice is suddenly quenched from an insulating to a superfluid state. We observe slowly damped phase coherence oscillations in the regime of large filling factor (~100 bosons per site) at a frequency proportional to the generalized Josephson frequency. The truncated Wigner approximation (TWA) predicts the frequency of the observed oscillations.
引用
@article{arxiv.cond-mat/0504762,
title = {Non-equilibrium coherence dynamics of a soft boson lattice},
author = {A. K. Tuchman and C. Orzel and A. Polkovnikov and M. A. Kasevich},
journal= {arXiv preprint arXiv:cond-mat/0504762},
year = {2009}
}
备注
10 pages. 4 figures