Three-level approximation for interacting Boson transition-temperature calculation

K.M. Khanna and S.N. Mehrotra

Physica A: Statistical Mechanics and its Applications, 1975, vol. 81, issue 2, 311-317

Abstract: The normal-superfluid phase-transition temperature of a dilute Bose system whose particles interact via a two-body potential composed of a hard core followed by a weak attractive tail is studied using the three-level approximation. It is found that, for such a system, the three-level approximation does give results, for the transition temperature, approximately equal to the lambda-transition temperature of liquid 4He. The condensed state is composed of ε0 = 0, ε1 = E0/N and ε2, such that the states ε0 and ε1 lie below the cutoff momentum.

Date: 1975
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:81:y:1975:i:2:p:311-317

DOI: 10.1016/0378-4371(75)90070-9

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