Next-to-next-to-leading-order epsilon expansion for a Fermi gas at infinite scattering length

Details Next-to-next-to-leading-order epsilon expansion for a Fermi gas at infinite scattering length Next-to-next-to-leading-order epsilon expansion for a Fermi gas at infinite scattering length

2006-08-22

arxiv.org/abs/cond-mat/0608477v2

Phys.Rev.A75:043605,2007

Physics

Condensed Matter

Other Condensed Matter

28 pages, 14 figures

Scientific paper

10.1103/PhysRevA.75.043605

We extend previous work on applying the epsilon-expansion to universal properties of a cold, dilute Fermi gas in the unitary regime of infinite scattering length. We compute the ratio xi = mu/epsilon_F of chemical potential to ideal gas Fermi energy to next-to-next-to-leading order (NNLO) in epsilon=4-d, where d is the number of spatial dimensions. We also explore the nature of corrections from the order after NNLO.

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