Quantum phases in an optical lattice

Details Quantum phases in an optical lattice Quantum phases in an optical lattice

2000-11-07

arxiv.org/abs/cond-mat/0011108v1

Physics

Condensed Matter

Statistical Mechanics

12 pages of ReVTeX with 10 postscript figures. Submitted for publication in Physical Review A

Scientific paper

10.1103/PhysRevA.63.053601

We present the zero-temperature phase diagram of bosonic atoms in an optical lattice, using two different mean-field approaches. The phase diagram consists of various insulating phases and a superfluid phase. We explore the nature of the insulating phase by calculating both the quasiparticle and quasihole dispersion relation. We also determine the parameters of our single band Bose-Hubbard model in terms of the microscopic parameters of the atoms in the optical lattice.

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