Intermediate-temperature superfluidity in an atomic fermi gas with population imbalance.
We derive the underlying finite temperature theory which describes Fermi gas superfluidity with population imbalance in a homogeneous system. We compute the pair formation temperature, superfluid transition temperature Tc, and superfluid density in a manner consistent with the standard ground state equations and, thereby, present a complete phase diagram. Finite temperature stabilizes superfluidity, as manifested by two solutions for Tc or by low T instabilities. At unitarity, the polarized state is an "intermediate-temperature superfluid."
Chien
Chih-Chun
CC
James Franck Institute and Department of Physics, University of Chicago, Chicago, Illinois 60637, USA.
Chen
Qijin
Q
He
Yan
Y
Levin
K
K