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RESEARCH PRODUCT

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

T. K. KoponenJani-petri MartikainenPäivi TörmäTomi Paananen

subject

PhysicsCondensed Matter::Quantum GasesOptical latticeCondensed matter physicsFilling factorCondensed Matter - SuperconductivityFOS: Physical sciencesGeneral Physics and AstronomyPolarization (waves)01 natural sciences010305 fluids & plasmasSuperconductivity (cond-mat.supr-con)Condensed Matter - Other Condensed MatterTime of flightLattice (order)Phase (matter)Condensed Matter::Superconductivity0103 physical sciences010306 general physicsFermi gasOther Condensed Matter (cond-mat.other)Phase diagram

description

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.

yearjournalcountryeditionlanguage
2007-01-19
10.1103/physrevlett.99.120403http://arxiv.org/abs/cond-mat/0701484