Bose-Einstein condensation and superfluidity of dilute Bose gas in a random potential

Details Bose-Einstein condensation and superfluidity of dilute Bose gas in a random potential Bose-Einstein condensation and superfluidity of dilute Bose gas in a random potential

2002-02-21

arxiv.org/abs/cond-mat/0202364v2

Physics

Condensed Matter

Soft Condensed Matter

9 pages, 11 figures, accepted for publication in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.66.174516

We develop the dilute Bose gas model with random potential in order to understand the Bose system in random media such as 4He in porous glass. Using the random potential taking account of the pore size dependence, we can compare quantitatively the calculated specific heat with the experimental results, without free parameters. The agreement is excellent at low temperatures, which justifies our model. The relation between Bose condensation and superfluidity is discussed. Our model can predict some unobserved phenomena in this system.

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