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Hartree shift in unitary Fermi gases

Research paper by J. J. Kinnunen

Indexed on: 24 Mar '11Published on: 24 Mar '11Published in: arXiv - Condensed Matter - Quantum Gases



Abstract

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.