2002/08/31 by Andras Suto
Physics and Astronomy · Mathematics · #cond-mat.stat-mech #math-ph #math.MP
published as J. Stat. Phys. 112 (2003) 375-396 · Published version
arxiv created 2003/08/06 · arxiv updated 2009/11/30
We study condensation of trapped bosons in the limit when the number of particles tends to infinity. For the noninteracting gas we prove that there is no phase transition in any dimension, but in any dimension at any temperature the system is 100% condensated into the one-particle ground state. In the case of an interacting gas we show that for a family of suitably scaled pair interactions, the Gross-Pitaevskii scaling included, a less-than-100% condensation into a one-particle eigenstate, which may depend on the interaction strength, persists at all temperatures.