Two-superfluid Model of Two-component Bose-Einstein Condensates; First Sound and Second Sound
Quantum Gases
2010-06-24 v1
Abstract
Superfluid He at a finite temperature is described by the two-fluid model with the normal fluid component and the superfluid component.We formulate the two-fluid model for two-component BECs, namely two-superfluid model, starting from the coupled Gross-Pitaevskii equations.The two-superfluid model well corresponds to the two-fluid model in superfluid He.In a special condition, the two sound modes in the two-superfluid model behave like first and second sounds in the two-fluid model of superfluid He.
Keywords
Cite
@article{arxiv.1006.4450,
title = {Two-superfluid Model of Two-component Bose-Einstein Condensates; First Sound and Second Sound},
author = {Shungo. Ishino and Hiromitsu Takeuchi and Makoto. Tsubota},
journal= {arXiv preprint arXiv:1006.4450},
year = {2010}
}
Comments
6 pages, 1 figures, submitted to Journal of Low Temperature Physics