3 papers
cond-mat.quant-gas2018
Proof of Bose condensation for weakly interacting lattice bosons
D. P. Sankovich
A weakly interacting Bose gas on a simple cubic lattice is considered. We prove the existence of the standard or zero-mode Bose condensation at sufficiently low temperature. This r…
cond-mat.stat-mech2008
Coexistence of Non-Conventional Condensates in Two-Level Bose Atom System
M. Corgini, C. Rojas-Molina, D. P. Sankovich
In the framework of the Bogolyubov approximation and using the Bogolyubov inequalities we give a simple proof of the coexistence of two non-conventional Bose-Einstein condensates i…
math-ph2001
Bogolyubov Measure in Quantum Equilibrium Statistical Mechanics
D. P. Sankovich
Application of the functional integration methods in equilibrium statistical mechanics of quantum Bose-systems is considered. We show that Gibbs equilibrium averages of Bose-operat…