Bose condensation in strongly monideal systems

V.I. Yukalov

Physica A: Statistical Mechanics and its Applications, 1980, vol. 100, issue 2, 431-442

Abstract: The possibility of the formation of a condensate with a finite absolute value of the momentum k0 in a strongly nonideal Bose system is considered. Such a condensate comes into existence when the one-particle spectrum of a normal system touches zero in the point k0 ≠ 0. The form of a correlation function below the condensation point shows the appearance of a long-range order, but not the infinite long-range one. In the case of liquid 4He estimates show that k0 ⪅ 1 Å−1, and at the temperature T>0 ∼ 1 K this unusual condensate with a finite magnitude of the momentum turns into the conventional Bose-Einstein condensate with the zero momentum. The properties of correlation functions in the spaces of different dimensions are discussed.

Date: 1980
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Citations: View citations in EconPapers (5)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:100:y:1980:i:2:p:431-442

DOI: 10.1016/0378-4371(80)90130-2

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