Rb-87 扩张热云中的流体动力学行为
凝聚态物理
2012-10-17 v1
摘要
We study hydrodynamic behavior in expanding thermal clouds of Rb-87 released from an elongated trap. At our highest densities the mean free path is smaller than the radial size of the cloud. After release the clouds expand anisotropically. The cloud temperature drops by as much as 30%. This is attributed to isentropic cooling during the early stages of the expansion. We present an analytical model to describe the expansion and to estimate the cooling. Important consequences for time-of-flight thermometry are discussed.
引用
@article{arxiv.cond-mat/0308493,
title = {Hydrodynamic behavior in expanding thermal clouds of Rb-87},
author = {I. Shvarchuck and Ch. Buggle and D. S. Petrov and M. Kemmann and W. von Klitzing and G. V. Shlyapnikov and J. T. M. Walraven},
journal= {arXiv preprint arXiv:cond-mat/0308493},
year = {2012}
}
备注
7 pages with 2 figures