Dilute resonating gases and the third virial coefficient

Paulo F. Bedaque; Gautam Rupak

doi:10.1103/physrevb.67.174513

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Dilute resonating gases and the third virial coefficient

Paulo F. Bedaque·Gautam Rupak

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Abstract

We study dilute gases with short range interactions and large two-body scattering lengths. At temperatures between the condensation temperature and the scale set by therange of the potential there is a high degree of universality. The first two terms in the expansion of thermodynamic functions in powers of the fugacity $z$, which measures the diluteness of the system, are determined by the scattering length only. The term proportional to $z^3$ depends only on one new parameter describing the three-body physics. We compute the third term of the expansion and show that, for many values of this new parameter, the $z^3$ term may be the dominant one.

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Paulo F. Bedaque, Gautam Rupak. 2002-06-26. Dilute resonating gases and the third virial coefficient. https://doi.org/10.1103/physrevb.67.174513

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