Kelvin Waves of Quantized Vortex Lines in Trapped Bose-Einstein Condensates
Other Condensed Matter
2008-07-10 v2
Abstract
We have theoretically investigated Kelvin waves of quantized vortex lines in trapped Bose-Einstein condensates. Counterrotating perturbation induces an elliptical instability to the initially straight vortex line, driven by a parametric resonance between a quadrupole mode and a pair of Kelvin modes of opposite momenta. Subsequently, Kelvin waves rapidly decay to longer wavelengths emitting sound waves in the process. We present a modified Kelvin wave dispersion relation for trapped superfluids and propose a simple method to excite Kelvin waves of specific wave number.
Cite
@article{arxiv.0803.2574,
title = {Kelvin Waves of Quantized Vortex Lines in Trapped Bose-Einstein Condensates},
author = {T. P. Simula and T. Mizushima and K. Machida},
journal= {arXiv preprint arXiv:0803.2574},
year = {2008}
}
Comments
4 pages, 4 figures, title changed, minor revisions