Quantum magnetism with multicomponent polar molecules in an optical lattice
Ryan Barnett, Dmitry Petrov, Mikhail Lukin, Eugene Demler
Abstract
We consider bosonic dipolar molecules in an optical lattice prepared in a mixture of different rotational states. The 1/r3 interaction between molecules for this system is produced by exchanging a quantum of angular momentum between two molecules. We show that the Mott states of such systems have a large variety of non-trivial spin orderings including a state with ordering wave vector that can be changed by tilting the lattice. As the Mott insulating phase is melted, we also describe several exotic superfluid phases that will occur.
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