Supersolid and charge-density-wave states from anisotropic interaction in an optical lattice

Journal Article · Mon Nov 15 04:00:00 EST 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.053607· OSTI ID:21528687

Chan, Y -H; Han, Y -J; Duan, L -M ^[1]

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1. Department of Physics and MCTP, University of Michigan, Ann Arbor, Michigan 48109 (United States)

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 the 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.

• OSTI ID: 21528687
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 82; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALGORITHMS
ANISOTROPY
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
CHARGE DENSITY
COLLISIONS
CRYSTAL LATTICES
CRYSTAL MODELS
CRYSTAL STRUCTURE
DIAGRAMS
DIPOLES
HAMILTONIANS
HUBBARD MODEL
INFORMATION
INTERACTIONS
MATHEMATICAL LOGIC
MATHEMATICAL MODELS
MATHEMATICAL OPERATORS
MOLECULE COLLISIONS
MULTIPOLES
PHASE DIAGRAMS
QUANTUM OPERATORS
SOLIDS
SUPERFLUIDITY
TETRAGONAL LATTICES
TWO-DIMENSIONAL CALCULATIONS