Quantum Phases of Ultracold Bosonic Atoms in a Two-Dimensional Optical Superlattice

Details Quantum Phases of Ultracold Bosonic Atoms in a Two-Dimensional Optical Superlattice Quantum Phases of Ultracold Bosonic Atoms in a Two-Dimensional Optical Superlattice

2007-05-14

arxiv.org/abs/0705.1888v3

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

We study quantum phases of ultracold bosonic atoms in a two-dimensional optical superlattice. The extended Bose-Hubbard model derived from the system of ultracold bosonic atoms in an optical superlattice is solved numerically with Gutzwiller approach. We find that the modulated superfluid(MS), Mott-insulator (MI) and density-wave(DW) phases appear in some regimes of parameters. The experimental detection of the first order correlations and the second order correlations of different quantum phases with time-of-flight and noise-correlation techniques is proposed.

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