Response function of strongly interacting Fermi gas in a virial expansion

Abstract

The dynamic response functions of strongly interacting fermion gas in homogeneous space are investigated in a virial expansion to second order. The density response function exhibits transition from atomic to molecular response, as the interaction strength increases and the system undergoes BCS-BEC crossover. The qualitative features of density and spin response agree with measurements from the Bragg spectroscopy experiments. The virial response is exact at low density and high temperature, therefore providing a benchmark for many-body response.

Revised version with additional discussion on density response at unitarity. Accepted to Physical Review A

References in corpus (8)

• Bragg spectroscopy of a strongly interacting Fermi gas
• Virial expansion for a strongly correlated Fermi gas
• Effective-Range Dependence of Resonantly Interacting Fermions
• Dynamic spin response of a strongly interacting Fermi gas
• The Neutrino Response of Low-Density Neutron Matter from the Virial Expansion
• Bragg Spectroscopy of Cold Atomic Fermi Gases
• Probing strongly interacting atomic gases with energetic atoms
• Dynamic response of strongly correlated Fermi gases in the quantum virial expansion

Cited by in corpus (2)

• Pseudogaps in strongly interacting Fermi gases
• Dynamic structure factor of a strongly correlated Fermi superfluid within a density functional theory approach