Hartree shift in unitary Fermi 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.

31 pages, many figures

References in corpus (21)

• Many-Body Physics with Ultracold Gases
• Theory of ultracold Fermi gases
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• Superfluid density of states and pseudogap phenomenon in the BCS-BEC crossover regime of a superfluid Fermi gas
• Collective modes of trapped Fermi gases with in-medium interaction
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• Interacting Preformed Cooper Pairs in Resonant Fermi Gases
• A Composite Fermion Approach to the Ultracold Dilute Fermi Gas

Cited by in corpus (18)

• Breakdown of Fermi liquid description for strongly interacting fermions
• Pseudogaps in strongly interacting Fermi gases
• Attractive Fermi polarons at nonzero temperature with finite impurityconcentration
• Physics of ultracold Fermi gases revealed by spectroscopies
• Many Fermi polarons at nonzero temperature
• Energy and contact of the one-dimensional Fermi polaron at zero and finite temperature
• Strong-coupling corrections to ground-state properties of a superfluid Fermi gas
• Collective excitations of a trapped Fermi gas at finite temperature
• Momentum-resolved spectroscopy of a Fermi liquid
• Unitary $p$-wave Fermi gas in one dimension
• Non-Hermitian topological Fermi superfluid near the $p$-wave unitary limit
• Quench-induced delocalization
• Quasiparticle scattering rate in a strongly polarised Fermi mixture
• Brueckner $G$-matrix approach to two-dimensional Fermi gases with the finite-range attractive interaction
• Dominant Andreev Reflection through Nonlinear Radio-Frequency Transport
• Non-Galilean response of Rashba coupled Fermi gases
• Thermodynamic Properties of Universal Fermi Gases
• Quasiparticle disintegration in fermionic superfluids