Statistical mechanics of an ideal Bose gas in a confined geometry

Details Statistical mechanics of an ideal Bose gas in a confined geometry Statistical mechanics of an ideal Bose gas in a confined geometry

2005-07-19

arxiv.org/abs/cond-mat/0507436v1

Physics

Condensed Matter

Statistical Mechanics

13 pages, 2 eps figures, revtex4

Scientific paper

10.1088/0305-4470/39/4/001

We study the behaviour of an ideal non-relativistic Bose gas in a three-dimensional space where one of the dimensions is compactified to form a circle. In this case there is no phase transition like that for the case of an infinite volume, nevertheless Bose-Einstein condensation signified by a sudden buildup of particles in the ground state can occur. We use the grand canonical ensemble to study this problem. In particular, the specific heat is evaluated numerically, as well as analytically in certain limits. We show analytically how the familiar result for the specific heat is recovered as we let the size of the circle become large so that the infinite volume limit is approached. We also examine in detail the behaviour of the chemical potential and establish the precise manner in which it approaches zero as the volume becomes large.

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