Polarized fermions in the unitarity limit

Abstract

We consider a polarized Fermi gas in the unitarity limit. Results are calculated analytically up to next-to-leading order in an expansion about d=4 spatial dimensions. We find a first order transition from superfluid to normal phase. The critical chemical potential asymmetry for this phase transition is delta_mu_c= 2/(mu epsilon)*(1-0.467ε), where epsilon=4-d is the expansion parameter and 'mu' is the average chemical potential of the two fermion species. Stability of the superfluid phase in the presence of supercurrents is also studied.

5 pages, 5 figures, LaTeX2e; minor changes, note added at the end, to be published in PRA

References in corpus (6)

• Direct Observation of the Superfluid Phase Transition in Ultracold Fermi Gases
• Critical Temperature and Thermodynamics of Attractive Fermions at Unitarity
• Epsilon expansion for a Fermi gas at infinite scattering length
• Chromomagnetic instability in dense quark matter
• Phase diagram of a cold polarized Fermi gas
• Meson current in the CFL phase

Cited by in corpus (7)

• Large Amplitude Dynamics of the Pairing Correlations in a Unitary Fermi Gas
• Density Functional Theory for non-relativistic Fermions in the Unitarity Limit
• Ground-state energy of the unitary Fermi gas from the epsilon expansion
• BCS BEC crossover and phase structure of relativistic system: a variational approach
• Effective Lagrangian of unitary Fermi gas from $\epsilon$ expansion
• Color superconductivity in ultra-dense quark matter
• Unitary Fermi gas in the epsilon expansion