2010/06/10 by Doga Murat Kurkcuoglu, Li Han, Kurkcuoglu, Doga Murat +3
Physics and Astronomy · #FOS: Physical sciences #Quantum Gases (cond-mat.quant-gas) #cond-mat.quant-gas
paper · pdf · doi:10.48550/arxiv.1006.2072
4 pages, 3 figures
arxiv created 2014/10/13 · arxiv updated 2014/10/14
We describe the emergence of superfluid phases of ultracold dipolar fermions in optical lattices for two-dimensional systems. Considering the many-body screening of dipolar interactions at intermediate and larger filling factors, we show that several superfluid phases with distinct pairing symmetries naturally arise in the singlet channel: local s-wave (sl), extended s-wave (se), d-wave (d) or time-reversal-symmetry breaking (sl + se ± id)-wave. We obtain the temperature versus filling factor phase diagram and show that d-wave pairing is favored near half-filling, that (sl + se)-wave is favored near zero or full filling, and that time-reversal-breaking (sl + se ± id)-wave is favored in between. The inclusion of a harmonic trap reveals that a sequence of phases can coexist in the cloud depending on the filling factor at the center of the trap. Most notably in the spatial region where the (sl + se ± id)-wave superfluid occurs, spontaneous currents are generated, and may be detected using velocity sensitive Bragg spectroscopy.