### Session C4: Dipolar Gases

2:00 PM–4:00 PM, Tuesday, June 14, 2011
Room: A704

Chair: Robin Cote, University of Connecticut

Abstract ID: BAPS.2011.DAMOP.C4.8

### Abstract: C4.00008 : Density wave patterns for fermionic dipolar molecules on a square optical lattice: Mean-field-theory analysis

3:24 PM–3:36 PM

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#### Authors:

Karlis Mikelsons
(Georgetown University)

Jim Freericks
(Georgetown University)

We model a system of ultracold fermionic dipolar molecules on a two-dimensional square lattice. Assuming that the molecules are in their nondegenerate hyperfine ground state, and that the dipole moment is polarized perpendicular to the plane (as in the recent experiments on $^{40}$K-$^{87}$Rb molecules), we approximate these molecules as spinless fermions with long range repulsive dipolar interactions. We use mean field theory to obtain the phase diagram as a function of the filling, the strength of interaction and the temperature. We find a number of ordered density wave phases in the system, as well as phase separation between these phases. A Monte Carlo analysis shows that the higher-period phases are usually suppressed in the exact solution.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.DAMOP.C4.8