Finite Temperature Collapse of a Bose Gas with Attractive Interactions (extended version)

Details Finite Temperature Collapse of a Bose Gas with Attractive Interactions (extended version) Finite Temperature Collapse of a Bose Gas with Attractive Interactions (extended version)

2000-05-19

arxiv.org/abs/cond-mat/0005323v1

Physics

Condensed Matter

Statistical Mechanics

23 pages, 5 figures -- expanded version of cond-mat/9908133

Scientific paper

We study the mechanical stability of the weakly interacting Bose gas with attractive interactions, and construct a unified picture of the collapse valid from the low temperature condensed regime to the high temperature classical regime. As we show, the non-condensed particles play a crucial role in determining the region of stability, even providing a mechanism for collapse in the non-condensed cloud. Furthermore, we demonstrate that the mechanical instability prevents BCS-type ``pairing'' in the attractive Bose gas. We extend our results to describe domain formation in spinor condensates.

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