6 papers · 1 filter
The kinetic and interaction energies of a trapped Bose gas: Beyond the mean field
A. Yu. Cherny, A. A. Shanenko
The kinetic and interaction energies of a three-dimensional dilute ground-state Bose gas confined in a trap are calculated beyond a mean-field treatment. They are found to depend o…
Dilute Bose gas in two dimensions: Density expansions and the Gross-Pitaevskii equation
A. Yu. Cherny, A. A. Shanenko
A dilute two-dimensional (2D) Bose gas at zero temperature is studied by the method developed earlier by the authors. Low density expansions are derived for the chemical potential,…
Towards Strong-Coupling Generalization of the Bogoliubov Model
A. Yu. Cherny, A. A. Shanenko
The well-known results concerning a dilute Bose gas with the short-range repulsive interaction should be reconsidered due to a thermodynamic inconsistency of the method being basic…
The Dilute Bose Gas Revised
A. Yu. Cherny, A. A. Shanenko
The well-known results concerning a dilute Bose gas with the short-range repulsive interaction should be reconsidered due to a thermodynamic inconsistency of the method being basic…
On the 'Strong-Coupling' Generalization of the Bogoliubov Model
A. Yu. Cherny, A. A. Shanenko
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…
On the Momentum Distribution and Condensate Fraction in the Bose Liquid
A. Yu. Cherny, A. A. Shanenko
The model recently proposed by A.A. Shanenko [Phys. Lett. A 227 (1997) 367] is used to derive linear integro-differential equations whose solutions provide reasonable estimates for…