Superfluid to insulator phase transition in a unitary Fermi gas
arXiv:0803.2293 · doi:10.1103/PhysRevA.78.053629
Abstract
We study the evolution of the energy gap in a unitary Fermi gas as a function of temperature. To this end we approximate the Fermi gas by the Hubbard lattice Hamiltonian and solve using the dynamical mean-field approximation. We have found that below the critical temperature, Tc, the system is a superfluid and the energy gap is decreasing monotonously. For temperatures above Tc the system is an insulator and the corresponding energy gap is monotonously increasing.
4 pages,4 figures