Supersolid Polar Molecules beyond Pairwise Interactions
arXiv:1101.0913 · doi:10.1103/PhysRevB.83.134511
Abstract
We explore the phase diagram of ultracold bosonic polar molecules confined to a planar optical lattice of triangular geometry. External static electric and microwave fields can be employed to tune the effective interactions between the polar molecules into a regime of extended two- and three-body repulsions of comparable strength, leading to a rich quantum phase diagram. In addition to various solid phases, an extended supersolid phase is found to persist deep into the three-body dominated regime. While three-body interactions break particle-hole symmetry explicitly, a characteristic supersolid-supersolid quantum phase transition is observed, which indicates the restoration of particle-hole symmetry at half-filling. We revisit the spatial structure of the supersolid at this filling, regarding the existence of a further supersolid phase with three inequivalent sublattices, and provide evidence that this state is excluded also at finite temperatures.
6 pages, 10 figures; published version
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Cited by in corpus (5)
- Generic First-Order vs. Continuous Quantum Nucleation of Supersolidity
- Three-body interactions on a triangular lattice
- Three-body interacting dipolar bosons and the fate of lattice supersolidity
- Triplet Superfluidity on a triangular ladder with dipolar fermions
- Thermal phase transitions in a honeycomb lattice gas with three-body interactions