1211.3779 (Michael McNeil Forbes)

The Unitary Fermi Gas in a Harmonic Trap and its Static Response    [PDF]

Michael McNeil Forbes

We use harmonically trapped systems to find the leading gradient corrections of the supefluid local density approximation (SLDA) - a density functional theory (DFT) describing the unitary Fermi gas (UFG). We find the leading order correction to be negative, and predict the q^2 coefficient of the long-range static response c = 1.5(3) - a factor of two smaller than predicted by mean-field theory - thereby establishing a new and experimentally measurably universal constant.

View original: http://arxiv.org/abs/1211.3779