Mean-field theory for Bose-Hubbard model under a magnetic field

Journal Article · Mon Jan 15 00:00:00 EST 2007 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.75.045133· OSTI ID:20976666

Oktel, M Oe; Tanatar, B ^[1]; Nita, M ^[2]

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1. Department of Physics, Bilkent University, 06800 Bilkent, Ankara (Turkey)
2. Institute of Physics and Technology of Materials, P.O. Box MG7, Bucharest-Magurele (Romania)

We consider the superfluid-insulator transition for cold bosons under an effective magnetic field. We investigate how the applied magnetic field affects the Mott transition within mean-field theory and find that the critical hopping strength (t/U){sub c} increases with the applied field. The increase in the critical hopping follows the bandwidth of the Hofstadter butterfly at the given value of the magnetic field. We also calculate the magnetization and superfluid density within mean-field theory.

• OSTI ID: 20976666
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 75, Issue 4; Other Information: DOI: 10.1103/PhysRevB.75.045133; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BOSONS
DENSITY
HUBBARD MODEL
MAGNETIC FIELDS
MAGNETIZATION
MEAN-FIELD THEORY
SUPERFLUIDITY