Solitons in two-dimensional Bose-Einstein condensates
Superconductivity
2009-11-13 v3 Other Condensed Matter
Abstract
The excitations of a two-dimensional (2D) Bose-Einstein condensate in the presence of a soliton are studied by solving the Kadomtsev-Petviashvili equation which is valid when the velocity of the soliton approaches the speed of sound. The excitation spectrum is found to contain states which are localized near the soliton and have a dispersion law similar to the one of the stable branch of transverse oscillations of a 1D gray soliton in a 2D condensate. By using the stabilization method we show that these localized excitations behave as resonant states coupled to the continuum of free excitations of the condensate.
Cite
@article{arxiv.0801.3307,
title = {Solitons in two-dimensional Bose-Einstein condensates},
author = {Shunji Tsuchiya and Franco Dalfovo and Lev P. Pitaevskii},
journal= {arXiv preprint arXiv:0801.3307},
year = {2009}
}
Comments
4 pages, 4 figures, published version