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Aurel Bulgac

University of Washington, Seattle
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Local Density Functional Theory for Superfluid Fermionic Systems: The Unitary Gas

The first detailed comparison between ab initio calculations of finite
fermionic superfluid systems, performed recently by Chang and Bertsch
and by von Stecher, Greene and Blume, and the extension of the density
functional theory Superfluid Local Density Approximation (SLDA) is
presented. It is shown that SLDA reproduces the total energies, number
density distributions in inhomogeneous systems along with the energy of
the normal state in homogeneous systems. Unlike the Kohn-Sham LDA, in
SLDA the effective fermion mass differs from the bare fermion mass and
the spectrum of elementary excitations is also reproduced.

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