Volume 80, Number 5, December 2007
|Number of page(s)||6|
|Published online||25 October 2007|
New universal quantities characterizing inhomogeneous Fermi gases at the Feshbach resonance
HAS-ELTE Statistical and Biological Physics Research Group - Pázmány P. Sétány 1/A, H-1117 Budapest, Hungary
2 Department of Physics of Complex Systems, Eötvös University - Pázmány P. Sétány 1/A, H-1117 Budapest, Hungary
3 Research Institute for Solid State Physics and Optics - P.O. Box 49, H-1525 Budapest, Hungary
Accepted: 2 October 2007
Gradient corrections to the local density approximation are formulated for the density and the gap function in case of a spin- Fermi gas at unitarity. The related new universal numbers are calculated within the framework of the mean-field BCS model.
PACS: 05.30.Fk – Fermion systems and electron gas / 71.15.Mb – Density functional theory, local density approximation, gradient and other corrections / 74.20.Fg – BCS theory and its development
© Europhysics Letters Association, 2007
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