Finite temperature phase diagram of a polarized Fermi gas in an optical lattice

Details Finite temperature phase diagram of a polarized Fermi gas in an optical lattice Finite temperature phase diagram of a polarized Fermi gas in an optical lattice

2007-01-19

arxiv.org/abs/cond-mat/0701484v2

Phys. Rev. Lett. 99, 120403 (2007)

Physics

Condensed Matter

Superconductivity

Journal version

Scientific paper

10.1103/PhysRevLett.99.120403

We present phase diagrams for a polarized Fermi gas in an optical lattice as a function of temperature, polarization, and lattice filling factor. We consider the Fulde-Ferrel-Larkin-Ovchinnikov (FFLO), Sarma or breached pair (BP), and BCS phases, and the normal state and phase separation. We show that the FFLO phase appears in a considerable portion of the phase diagram. The diagrams have two critical points of different nature. We show how various phases leave clear signatures to momentum distributions of the atoms which can be observed after time of flight expansion.

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