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

被引：9
作者：
Ghanbari, Saeed [1 ,2 ]
Blakie, P. Blair [3 ]
Hannaford, Peter [1 ,2 ]
Kieu, Tien D. [1 ,2 ]
机构：
[1] Swinburne Univ Technol, Ctr Atom Opt & Ultrafast Spect, Melbourne, Vic, Australia
[2] Swinburne Univ Technol, ARC Ctr Excellence Quantum Atom Opt, Melbourne, Vic, Australia
[3] Univ Otago, Dept Phys, Jack Dodd Ctr Photon & Ultra Cold Atoms, Dunedin, New Zealand
来源：
EUROPEAN PHYSICAL JOURNAL B | 2009年 / 70卷 / 03期
关键词：
BOSE-HUBBARD MODEL; OPTICAL LATTICES; ULTRACOLD ATOMS; TRAPS; LOCALIZATION; DYNAMICS;
D O I：
10.1140/epjb/e2009-00210-8
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
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.
引用
收藏
页码：305 / 310
页数：6
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