Bose-Einstein condensation in the presence of a uniform field and a point-like impurity

Details Bose-Einstein condensation in the presence of a uniform field and a point-like impurity Bose-Einstein condensation in the presence of a uniform field and a point-like impurity

2001-11-26

arxiv.org/abs/cond-mat/0111490v2

Phys.Rev. A65 (2002) 053606

Physics

Condensed Matter

Statistical Mechanics

14 pages, REVTEX. Revised version, accepted for publication in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.65.053606

The behavior of an ideal $D$-dimensional boson gas in the presence of a uniform gravitational field is analyzed. It is explicitly shown that, contrarily to an old standing folklore, the three-dimensional gas does not undergo Bose-Einstein condensation at finite temperature. On the other hand, Bose-Einstein condensation occurs at $T\neq 0$ for $D=1,2,3$ if there is a point-like impurity at the bottom of the vessel containing the gas.

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