The Condensate Equation for Non-Homogeneous Bosons

#### A.F. Verbeure

2007, v.13, №2, 289-296

ABSTRACT

We consider Boson systems with non-ground state $(q \neq 0)$-condensation. This phenomenon is accompanied with spontaneous breaking of the translation symmetry down to a lattice symmetry as well as of the gauge symmetry. We give a general and rigorous derivation of the condensate equation for these systems and discuss model applications.

Keywords: Bose-Einstein condensation,q-condensation,q-condensateequation,homogeneous and non-homogeneous condensation