Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/64733

Title

Superfluid to Mott insulator quantum phase transition in a 2D permanent magnetic lattice

Author(s)

Ghanbari, Saeed;  Blakie, P. B.;  Hannaford, Peter;  Kieu, Tien D.

Abstract

The accessibility of the critical parameters for the superfluid to Mott insulator quantum phase transition in a 2D permanent magnetic lattice is investigated. We determine the hopping matrix element J, the on-site interaction U, and hence the ratio J/U, in the harmonic oscillator wave function approximation. We show that for a range of realistic parameters the critical values of J/U, predicted by different methods for the Bose-Hubbard model in 2D, such as mean field theory and Monte Carlo simulations, are accessible in a 2D permanent magnetic lattice. The calculations are performed for a 2D permanent magnetic lattice created by two crossed arrays of parallel rectangular magnets plus a bias magnetic field.

Publication type

Journal article

Research centre

Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Atom Optics and Ultrafast Spectroscopy

Source

European Physical Journal B, Vol. 70, no. 3 (Aug 2009), pp. 305-310

Publication year

2009

FOR Code(s)

0204 Condensed Matter Physics;  0299 Other Physical Sciences

Keyword(s)

2D;  Magnetic lattices;  Mott insulator quantum phase transition;  Oscillator wave function

Publisher

Springer

ISSN

1434-6028

Publisher URL

http://dx.doi.org/10.1140/epjb/e2009-00210-8

Copyright

Copyright © EDP Sciences, Societ`a Italiana di Fisica, Springer-Verlag 2009.

Peer reviewed