On the theory of superfluidity

Details On the theory of superfluidity On the theory of superfluidity

2006-09-27

arxiv.org/abs/cond-mat/0609711v2

Ann. Phys. 323, 2367(2008)

Physics

Condensed Matter

Statistical Mechanics

simplified version; added references; 6 pages, 6 figures

Scientific paper

10.1016/j.aop.2008.06.010

We investigate the properties of dispersion spectra of one-dimensional periodic Bose systems with repulsive interparticle interactions. These systems with sufficient large interactions can support metastable supercurrent states, which correspond to the local minima of the dispersion spectra at non-zero momenta. The existence of local minima in the spectra and the energy barriers, which separate the minima, can be explained in terms of Bose exchange symmetry. We extend our study to the case of higher dimensional Bose systems. We suggest that superfluidity could be understood as a Bose exchange effect.

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