Theory of a degenerate bose fluid

E.R. Tuttle

Physica A: Statistical Mechanics and its Applications, 1978, vol. 91, issue 1, 249-275

Abstract: The χ-ensemble formulation of Lee and Yang is used as the basis for a theory of the degenerate Bose fluid. The expansions of the grand potential and the momentum distribution are rearranged through a set of simple transformations; the transformed expansions no longer contain free particle energies and distribution functions, and are well behaved at low temperatures. Instead, characteristic quasiparticle energies and distribution functions appear. The quasi-particle energy is seen to be phonon-like at low momenta and particle-like at high momenta. As the macroscopic occupation of the zero momentum state vanishes, the theory reduces to the usual theory of a normal Bose fluid.

Date: 1978
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:91:y:1978:i:1:p:249-275

DOI: 10.1016/0378-4371(78)90070-5

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