Atomic Bose Gas with Negative Scattering Length

Abstract

We derive the equation of state of a dilute atomic Bose gas with an interatomic interaction that has a negative scattering length and argue that two continuous phase transitions, occuring in the gas due to quantum degeneracy effects, are preempted by a first-order gas-liquid or gas-solid transition depending on the details of the interaction potential. We also discuss the consequences of this result for future experiments with magnetically trapped spin-polarized atomic gasses such as lithium and cesium.

16 PAGES, REVTEX 3.0, ACCEPTED FOR PUBLICATION IN PHYS. REV. A

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