J.V. Pul , A.F. Verbeure, V.A. ZAgrebnov
On Solvable Boson Models
(317K, pgf)

ABSTRACT.  The problem of equilibrium states and/or ground states of exactly solvable 
homogeneous boson models is stated and explicitly proved as a 
special case of the general variational problem of statistical 
mechanics in terms of quasi-free states. We apply the result to a 
model of superradiant Bose-Einstein condensation and to the 
Pairing Boson Model.