Condensation of Ideal Bose Gas Confined in a Box Within a Canonical Ensemble

Details Condensation of Ideal Bose Gas Confined in a Box Within a Canonical Ensemble Condensation of Ideal Bose Gas Confined in a Box Within a Canonical Ensemble

2007-07-18

arxiv.org/abs/0707.2715v2

Physical Review A 76, 063604 (2007)

Physics

Condensed Matter

Statistical Mechanics

18 pages, 8 figures

Scientific paper

10.1103/PhysRevA.76.063604

We set up recursion relations for the partition function and the ground-state occupancy for a fixed number of non-interacting bosons confined in a square box potential and determine the temperature dependence of the specific heat and the particle number in the ground state. A proper semiclassical treatment is set up which yields the correct small-T-behavior in contrast to an earlier theory in Feynman's textbook on Statistical Mechanics, in which the special role of the ground state was ignored. The results are compared with an exact quantum mechanical treatment. Furthermore, we derive the finite-size effect of the system.

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