Kelvon-roton instability of vortex lines in dipolar Bose-Einstein condensates
Other Condensed Matter
2009-11-13 v1
Abstract
The physics of vortex lines in dipolar condensates is studied. Due to the nonlocality of the dipolar interaction, the 3D character of the vortex plays a more important role in dipolar gases than in typical short-range interacting ones. In particular, the dipolar interaction significantly affects the stability of the transverse modes of the vortex line. Remarkably, in the presence of a periodic potential along the vortex line, a roton minimum may develop in the spectrum of transverse modes. We discuss the appropriate conditions at which this roton minimum may eventually lead to an instability of the straight vortex line, opening new scenarios for vortices in dipolar gases.
Keywords
Cite
@article{arxiv.0707.0441,
title = {Kelvon-roton instability of vortex lines in dipolar Bose-Einstein condensates},
author = {M. Klawunn and R. Nath and P. Pedri and L. Santos},
journal= {arXiv preprint arXiv:0707.0441},
year = {2009}
}
Comments
4 pages, 3 eps figures