Nature of 3D Bose Gases near Resonance

Details Nature of 3D Bose Gases near Resonance Nature of 3D Bose Gases near Resonance

2011-10-10

arxiv.org/abs/1110.2183v2

Phys. Rev. A 85, 023620 (2012)

Physics

Condensed Matter

Quantum Gases

8 pages, 3 figures, revised version to appear in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.85.023620

In this paper, we explore the nature of three-dimensional Bose gases at large positive scattering lengths via resummation of dominating processes involving a minimum number of virtual atoms. We focus on the energetics of the nearly fermionized Bose gases beyond the usual dilute limit. We also find that an onset instability sets in at a critical scattering length, beyond which the near-resonance Bose gases become strongly coupled to molecules and lose the metastability. Near the point of instability, the chemical potential reaches a maximum, and the effect of the three-body forces can be estimated to be around a few percent.

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