Interacting bosons in an optical lattice: Bose-Einstein condensates and Mott insulator

Journal Article · Tue May 15 00:00:00 EDT 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.75.053616· OSTI ID:20982576

Fialko, O; Moseley, Ch; Ziegler, K ^[1]

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1. Institut fuer Physik, Universitaet Augsburg, Universitaetsstrasse 1 (Germany)

A dense Bose gas with hard-core interaction is considered in an optical lattice. We study the phase diagram in terms of a special mean-field theory that describes a Bose-Einstein condensate and a Mott insulator with a single particle per lattice site for zero as well as for nonzero temperatures. We calculate the densities, the excitation spectrum, and the static structure factor for each of these phases.

• OSTI ID: 20982576
• Journal Information: Physical Review. A, Vol. 75, Issue 5; Other Information: DOI: 10.1103/PhysRevA.75.053616; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BOSE-EINSTEIN CONDENSATION
BOSE-EINSTEIN GAS
BOSONS
COMPUTER CALCULATIONS
CRYSTAL STRUCTURE
DENSITY
EXCITATION
INTERACTIONS
MEAN-FIELD THEORY
PARTICLES
PHASE DIAGRAMS
SPECTRA
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE ZERO K