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Bose condensation in strongly monideal systems

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  • Yukalov, V.I.

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.

Suggested Citation

  • Yukalov, V.I., 1980. "Bose condensation in strongly monideal systems," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 100(2), pages 431-442.
    • Handle: RePEc:eee:phsmap:v:100:y:1980:i:2:p:431-442
    DOI: 10.1016/0378-4371(80)90130-2
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    Cited by:

    1. Yukalov, V.I., 1987. "Procedure of quasi-averaging for heterophase mixtures," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 141(2), pages 352-374.
    2. Shumovsky, A.S. & Yukalov, V.I., 1982. "Exact solutions for heterophase ferromagnets," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 110(3), pages 518-534.
    3. Yukalov, V.I., 1986. "Effective Hamiltonians for systems with mixed symmetry," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 136(2), pages 575-587.
    4. Yukalov, V.I., 1981. "Statistical theory of heterophase fluctuations," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 108(2), pages 402-416.
    5. Yukalov, V.I., 1989. "Spin-phonon interactions in heterophase ferromagnets," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 155(3), pages 519-544.

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