Quasi-classical Approach to Bose Condensation in a Finite Potential Well

Details Quasi-classical Approach to Bose Condensation in a Finite Potential Well Quasi-classical Approach to Bose Condensation in a Finite Potential Well

2003-12-04

arxiv.org/abs/cond-mat/0312128v1

Physical Review B70, 045201 (2004)

Physics

Condensed Matter

Scientific paper

10.1103/PhysRevB.70.045201

We treat the problem of self-consistently interacting bosons in the presence of a finite (but macroscopic) potential well within a quasi-classical approximation for the normal component and the order parameter. We solve the equilibrium problem and show, that actually condensation occurs in two steps. One already at low densities with Bose condensation only in the well and another one corresponding to the usual condensation in bulk. The peak and width of the distribution of trapped particles in the well display a distinct signature of the local condensation. A possible connection to recent experiments with excitons is discussed.

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