Thermodynamics of Solitonic Matter Waves in a Toroidal Trap
arXiv:cond-mat/0609167 · doi:10.1103/PhysRevA.74.031603
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.
arXiv comment4 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
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- Effects of Axial Vorticity in Elongated Mixtures of Bose-Einstein Condensates
- Study of implosion in an attractive Bose-Einstein condensate
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