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

Abstract

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.

arXiv comment6 pages, REVTEX, no figures

References in corpus (4)

• On Pair-Particle Distribution in Imperfect Bose Gas
• Particle Correlations in the Generalized Thomas-Fermi Approach
• On the Charged Bose Liquid
• On the Momentum Distribution and Condensate Fraction in the Bose Liquid

Cited by in corpus (5)

• Short-range particle correlations in dilute Bose gas
• Self-consistent calculation of the coupling constant in the Gross-Pitaevskii equation
• Quasicondensate and superfluid fraction in the 2D charged-boson gas at finite temperature
• The Dilute Bose Gas Revised
• Hartree-Fock-Bogoliubov theory of a charged Bose gas at finite temperature