Polarized Fermi gases in asymmetric optical lattices - Condensed Matter > Quantum GasesReport as inadecuate




Polarized Fermi gases in asymmetric optical lattices - Condensed Matter > Quantum Gases - Download this document for free, or read online. Document in PDF available to download.

Abstract: The zero-temperature phase diagrams of imbalanced two-species Fermi gases areinvestigated in asymmetric optical lattices with arbitrary potential depths,based on the exact spectrum instead of the Fermi-Hubbard model. We study theeffect of lattice potentials and atomic densities to the fully pairedBardeen-Cooper-Schrieffer BCS state and particularly theFulde-Ferrell-Larkin-Ovchinnikov FFLO state. It is found that the increasinglattice potential favors BCS at low densities because of the enhanced effectivecoupling; whereas FFLO is favored at intermediate densities when the systemundergoes a dimensional crossover. Finally using local density approximation westudy the evolution of phase profile in the presence of external harmonic trapsby merely tuning the lattice potentials.



Author: Xiaoling Cui, Yupeng Wang

Source: https://arxiv.org/







Related documents