Friday, November 16, 2012

1205.4815 (Michael McNeil Forbes et al.)

Effective-Range Dependence of Resonantly Interacting Fermions    [PDF]

Michael McNeil Forbes, Stefano Gandolfi, Alexandros Gezerlis
We extract the leading effective range corrections to the equation of state of the unitary Fermi gas from ab initio fixed-node quantum Monte Carlo (FNQMC) calculations in a periodic box using a density functional theory (DFT), and show them to be universal by considering several two-body interactions. Furthermore, we find that the DFT is consistent with the best available unbiased QMC calculations, analytic results, and experimental measurements of the equation of state. We also discuss the asymptotic effective-range corrections for trapped systems and present the first QMC results with the correct asymptotic scaling.
View original: http://arxiv.org/abs/1205.4815

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