TY - JOUR
T1 - d-Wave Superfluidity in Optical Lattices of Ultracold Polar Molecules
JF - Physical Review A
Y1 - 2011
A1 - Kevin A. Kuns
A1 - Ana Maria Rey
A1 - Alexey V. Gorshkov
AB - Recent work on ultracold polar molecules, governed by a generalization of the t-J Hamiltonian, suggests that molecules may be better suited than atoms for studying d-wave superfluidity due to stronger interactions and larger tunability of the system. We compute the phase diagram for polar molecules in a checkerboard lattice consisting of weakly coupled square plaquettes. In the simplest experimentally realizable case where there is only tunneling and an XX-type spin-spin interaction, we identify the parameter regime where d-wave superfluidity occurs. We also find that the inclusion of a density-density interaction destroys the superfluid phase and that the inclusion of a spin-density or an Ising-type spin-spin interaction can enhance the superfluid phase. We also propose schemes for experimentally realizing the perturbative calculations exhibiting enhanced d-wave superfluidity.
VL - 84
UR - http://arxiv.org/abs/1110.5330v2
CP - 6
J1 - Phys. Rev. A
U5 - 10.1103/PhysRevA.84.063639
ER -