J. Tempere et Jt. Devreese, CANONICAL BOSE-EINSTEIN CONDENSATION OF INTERACTING BOSONS IN 2 DIMENSIONS, Solid state communications, 101(9), 1997, pp. 657-659
The onset of Bose-Einstein condensation in a 2D gas of bosons in a par
abolic confinement potential is investigated. For such a system of non
-interacting bosons, both the grand-canonical and the canonical partit
ion function are calculated. The canonical partition function of a sys
tem of harmonically interacting bosons in 2D is obtained analytically.
Both in the case of interacting and of non-interacting bosons, a dist
inct peak in the specific heat is found at a critical temperature and
the dependence of this critical temperature on the number of particles
and on the interparticle interaction strength is investigated. (C) 19
97 Elsevier Science Ltd.