Indexed on: 24 Mar '11Published on: 24 Mar '11Published in: arXiv - Condensed Matter - Quantum Gases
The Hartree energy shift is calculated for a unitary Fermi gas. By including the momentum dependence of the scattering amplitude explicitly, the Hartree energy shift remains finite even at unitarity. Extending the theory also for spin-imbalanced systems allows calculation of polaron properties. The results are in good agreement with more involved theories and experiments.