Correlation energy of a homogeneous dipolar Fermi gas
  We study the normal state of a 3-$d$ homogeneous dipolar Fermi gas beyond the Hartree-Fock approximation. The correlation energy is found of the same order as the Fock energy, unusually strong for a Fermi-liquid system. As a result, the critical density of mechanical collapse is smaller than that estimated in the Hartree-Fock approximation. With the correlation energy included, a new energy functional is proposed for the trapped system, and its property is explored. 
Bo Liu, Lan Yin
cond-mat.quant-gas cond-mat.str-el quant-ph