Thermodynamics of ideal quantum gas with fractional statistics in D dimensions

Details Thermodynamics of ideal quantum gas with fractional statistics in D dimensions Thermodynamics of ideal quantum gas with fractional statistics in D dimensions

2006-10-15

arxiv.org/abs/cond-mat/0610400v2

Physics

Condensed Matter

Statistical Mechanics

15 pages, 31 figures

Scientific paper

10.1103/PhysRevE.75.061120

We present exact and explicit results for the thermodynamic properties (isochores, isotherms, isobars, response functions, velocity of sound) of a quantum gas in dimensions D>=1 and with fractional exclusion statistics 0<=g<=1 connecting bosons (g=0) and fermions (g=1). In D=1 the results are equivalent to those of the Calogero-Sutherland model. Emphasis is given to the crossover between boson-like and fermion-like features, caused by aspects of the statistical interaction that mimic long-range attraction and short-range repulsion. The full isochoric heat capacity and the leading low-T term of the isobaric expansivity in D=2 are independent of g. The onset of Bose-Einstein condensation along the isobar occurs at a nonzero transition temperature in all dimensions. The T-dependence of the velocity of sound is in simple relation to isochores and isobars. The effects of soft container walls are accounted for rigorously for the case of a pure power-law potential.

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