Supersolid and charge density-wave states from anisotropic interaction in an optical lattice
arXiv:1005.1270 · doi:10.1103/PhysRevA.82.053607
Abstract
We show anisotropy of the dipole interaction between magnetic atoms or polar molecules can stabilize new quantum phases in an optical lattice. Using a well controlled numerical method based on the tensor network algorithm, we calculate phase diagram of the resultant effective Hamiltonian in a two-dimensional square lattice - an anisotropic Hubbard model of hard-core bosons with attractive interaction in one direction and repulsive interaction in the other direction. Besides the conventional superfluid and the Mott insulator states, we find the striped and the checkerboard charge density wave states and the supersolid phase that interconnect the superfluid and the striped solid states. The transition to the supersolid phase has a mechanism different from the case of the soft-core Bose Hubbard model.
5 pages, 5 figures.
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Cited by in corpus (6)
- A Strongly Dipolar Bose-Einstein Condensate of Dysprosium
- Dielectric-barrier discharges in two-dimensional lattice potentials
- Stability and structure of an anisotropically trapped dipolar Bose-Einstein condensate: angular and linear rotons
- Competing quantum phases of hard-core boson with tilted dipole-dipole interaction
- Tunneling frustration induced peculiar supersolid phases in the extended Bose-Hubbard model
- Phase Stability in the Two dimensional Anisotropic Boson Hubbard Hamiltonian