Bose-Einstein condensation in the presence of an impurity
arXiv:cond-mat/0007395 · doi:10.1016/S0375-9601(00)00791-X
Abstract
It is shown that Bose-Einstein condensation occurs for an ideal gas in two spatial dimensions in the presence of one impurity which is described quantum mechanically in terms of a point-like vortex and a contact interaction. This model is exactly solvable and embodies as a special case the analogous problem in three spatial dimensions.
6 pages, LaTeX, no figures. Misprints corrected