Classical-like wakes past elliptical obstacles in atomic Bose-Einstein condensates
Quantum Gases
2015-06-23 v1
Abstract
We reinvestigate numerically the classic problem of two-dimensional superfluid flow past an obstacle. Taking the obstacle to be elongated (perpendicular to the flow), rather than the usual circular form, is shown to promote the nucleation of quantized vortices, enhance their subsequent interactions, and lead to wakes which bear striking similarity to their classical (viscous) counterparts. Then, focussing on the recent experiment of Kwon et al. (arXiv:1403.4658) in a trapped condensate, we show that an elliptical obstacle leads to a cleaner and more efficient means to generate two-dimensional quantum turbulence.
Cite
@article{arxiv.1411.4842,
title = {Classical-like wakes past elliptical obstacles in atomic Bose-Einstein condensates},
author = {G. W. Stagg and A. J. Allen and C. F. Barenghi and N. G. Parker},
journal= {arXiv preprint arXiv:1411.4842},
year = {2015}
}
Comments
7 pages, 6 figures. Conference proceedings for the International Laser Physics Workshop (Sofia, July 2014)