Mott insulators in an optical lattice with high filling factors

Journal Article · Sat Mar 01 04:00:00 EST 2003 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.67.033606· OSTI ID:20633871

Oosten, D van ^[1]; Straten, P van der ^[2]; Stoof, H.T. C. ^[1]

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1. Institute for Theoretical Physics, Utrecht University, Leuvenlaan 4, 3584 CE Utrecht (Netherlands)
2. Debye Institute, Utrecht University, Princetonplein 5, 3584 CC Utrecht (Netherlands)

We discuss the superfluid to Mott insulator transition of an atomic Bose gas in an optical lattice with high filling factors. We show that in this multiband situation, the long-wavelength physics is described by a single-band Bose-Hubbard model. We determine the many-body renormalization of the tunneling and interaction parameters in the effective Bose-Hubbard Hamiltonian, and consider the resulting model at nonzero temperatures. We show that, in particular, for a one- or two-dimensional optical lattice, the Mott-insulator phase is more difficult to realize than anticipated previously.

• OSTI ID: 20633871
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 3 Vol. 67; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
BASIC INTERACTIONS
BOSE-EINSTEIN GAS
BOSONS
FLUCTUATIONS
HAMILTONIANS
HUBBARD MODEL
LATTICE FIELD THEORY
MANY-BODY PROBLEM
METALS
RENORMALIZATION
SUPERFLUIDITY
TUNNEL EFFECT
TWO-DIMENSIONAL CALCULATIONS
WAVELENGTHS