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On Condensations in the Bogoliubov Weakly Imperfect Bose Gas

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Abstract

We show that condensation in the Bogoliubov weakly imperfect Bose gas (WIBG) may appear in two stages. If interaction is such that the pressure of the WIBG does not coincide with the pressure of the perfect Bose gas (PBG), then the WIBG may manifest two kinds of condensations: nonconventional Bose condensation in zero mode, due to the interaction (the first stage), and conventional (generalized) Bose–Einstein condensation in modes next to the zero mode due to the particle density saturation (the second stage). Otherwise the WIBG manifests only the latter kind of condensation.

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Authors and Affiliations

  1. Instituut voor Theoretische Fysica, K. U., Leuven, Belgium

    J.-B. Bru & V. A. Zagrebnov

  2. Allocataire de Recherche MRT, France

    J.-B. Bru

  3. Université de la Méditerranée (Aix-Marseille II), France

    V. A. Zagrebnov

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  1. J.-B. Bru
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  2. V. A. Zagrebnov
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Bru, JB., Zagrebnov, V.A. On Condensations in the Bogoliubov Weakly Imperfect Bose Gas. Journal of Statistical Physics 99, 1297–1338 (2000). https://doi.org/10.1023/A:1018692823463

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