On the 'Strong-Coupling' Generalization of the Bogoliubov Model

Details On the 'Strong-Coupling' Generalization of the Bogoliubov Model On the 'Strong-Coupling' Generalization of the Bogoliubov Model

1998-11-29

arxiv.org/abs/cond-mat/9811405v2

Phys. Lett. A, vol. 250, No 1-3, pp. 170-176 (1998)

Physics

Condensed Matter

Statistical Mechanics

6 pages, REVTEX, no figures

Scientific paper

10.1016/S0375-9601(98)00835-4

A generalized Bogoliubov model of the Bose gas in the ground state is proposed which properly takes into account both the long-range and short-range spatial boson correlations. It concerns equilibrium characteristics and operates with in-medium Schrodinger equations for the pair wave functions of bosons being the eigenfunctions of the second-order reduced density matrix. The approach developed provides reasonable results for a dilute Bose gas with arbitrary strong interaction between particles (the 'strong-coupling' case) and comes to the canonical Bogoliubov model in the weak-coupling regime.

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