Superradiance from BEC vortices: a numerical study
General Relativity and Quantum Cosmology
2009-11-11 v1
Abstract
The scattering of sound wave perturbations from vortex excitations of Bose-Einstein condensates(BEC) is investigated by numerical integration of the associated Klein-Gordon equation. It is found that, at sufficiently high angular speeds, sound wave-packets can extract a sizeable fraction of the vortex energy through a mechanism of superradiant scattering. It is conjectured that this superradiant regime may be detectable in BEC experiments.
Cite
@article{arxiv.gr-qc/0503089,
title = {Superradiance from BEC vortices: a numerical study},
author = {F. Federici and C. Cherubini and S. Succi and M. P. Tosi},
journal= {arXiv preprint arXiv:gr-qc/0503089},
year = {2009}
}
Comments
4 pages, 4 figures