Force on a moving point impurity due to quantum fluctuations in a Bose-Einstein condensate
Statistical Mechanics
2009-11-11 v2 Other Condensed Matter
Quantum Physics
Abstract
An analytic expression is derived for a force on a weak point impurity arising from the scattering of quantum fluctuations in a slow-moving, weakly interacting, three-dimensional Bose-Einstein condensate at zero temperature. In an infinitely extended geometry, this force is shown to exist at any arbitrarily small flow velocity below Landau's critical velocity. Furthermore, this force is shown to be directly proportional to the flow speed.
Keywords
Cite
@article{arxiv.cond-mat/0601289,
title = {Force on a moving point impurity due to quantum fluctuations in a Bose-Einstein condensate},
author = {D. C. Roberts},
journal= {arXiv preprint arXiv:cond-mat/0601289},
year = {2009}
}
Comments
v2: corrected notation and other minor changes