Thermodynamics of Solitonic Matter Waves in a Toroidal Trap
Abstract
We investigate the thermodynamic properties of a Bose-Einstein condensate with negative scattering length confined in a toroidal trapping potential. By numerically solving the coupled Gross-Pitaevskii and Bogoliubov-de Gennes equations, we study the phase transition from the uniform state to the symmetry-breaking state characterized by a bright-soliton condensate and a localized thermal cloud. In the localized regime three states with a finite condensate fraction are present: the thermodynamically stable localized state, a metastable localized state and also a metastable uniform state. Remarkably, the presence of the stable localized state strongly increases the critical temperature of Bose-Einstein condensation.
Keywords
Cite
@article{arxiv.cond-mat/0609167,
title = {Thermodynamics of Solitonic Matter Waves in a Toroidal Trap},
author = {L. Salasnich and A. Parola and L. Reatto},
journal= {arXiv preprint arXiv:cond-mat/0609167},
year = {2009}
}
Comments
4 pages, 4 figures, to be published in Physical Review A as a Rapid Communication. Related papers can be found at http://www.padova.infm.it/salasnich/tdqg.html