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Attractive Boson and the Gas-Liquid Condensation

Shun-ichiro Koh
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Abstract

We calculate a grand partition function of the attractive Bose gas in the infinite space within some approximations. Using the idea of the Yang-Lee zeros, it is proved that the gas-liquid condensation occurs before the conventional condition of the Bose-Einstein condensation is satisfied. Further, it is pointed out that Bosons with a zero momentum play a role of a trigger to this gas-liquid condensation. We discuss its implication to the trapped atomic gas.

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Shun-ichiro Koh. 2000-09-29. Attractive Boson and the Gas-Liquid Condensation. https://doi.org/10.1103/physrevb.64.134529

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