On the ground state of the two-dimensional non-ideal bose gas

Yu.E. Lozovik and V.I. Yudson

Physica A: Statistical Mechanics and its Applications, 1978, vol. 93, issue 3, 493-502

Abstract: The theory of the ground state of the two-dimensional non-ideal Bose gas is presented. The conditions for the validity of the ladder and the Bogolubov approximations are derived. These conditions ensure the existence of a Bose condensate in the ground state of two-dimensional systems. These conditions are different from the corresponding conditions for the three-dimensional case. The connection between the effective interaction and the two-dimensional scattering amplitude at some characteristic energy κ2/2m (≠0) is obtained (f(κ = 0) = ∞ in the two-dimensional case).

Date: 1978
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:93:y:1978:i:3:p:493-502

DOI: 10.1016/0378-4371(78)90170-X

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