Roton-maxon spectrum and stability of trapped dipolar condensates
Condensed Matter
2009-11-10 v1
Abstract
We find that pancake dipolar condensates can exhibit a roton-maxon character of the excitation spectrum, so far only observed in superfluid helium. We also obtain a condition for the dynamical stability of these condensates. The spectrum and the border of instability are tunable by varying the particle density and/or the confining potential. This opens wide possibilities for manipulating the superfluid properties of dipolar condensates.
Keywords
Cite
@article{arxiv.cond-mat/0301474,
title = {Roton-maxon spectrum and stability of trapped dipolar condensates},
author = {L. Santos and G. V. Shlyapnikov and M. Lewenstein},
journal= {arXiv preprint arXiv:cond-mat/0301474},
year = {2009}
}
Comments
4 pages, 2 ps figures