Re-entrant transition of bosons in a quasiperiodic potential

被引：3

作者：

Cetoli, A. ^{[1
]}

Lundh, E. ^{[1
]}

机构：

[1] Umea Univ, Dept Phys, SE-90187 Umea, Sweden

来源：

EPL | 2010年 / 90卷 / 04期

关键词：

TONKS-GIRARDEAU GAS; OPTICAL LATTICE; INSULATOR TRANSITION; ULTRACOLD ATOMS; MOTT INSULATOR; SUPERFLUID;

D O I：

10.1209/0295-5075/90/46001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the behavior of a two-dimensional array of Bose-Einstein condensate tubes described by means of a Bose-Hubbard Hamiltonian. Using a Wannier function expansion for the wave function in each tube, we compute the Bose-Hubbard parameters related to two different longitudinal potentials, periodic and quasiperiodic. We predict that -upon increasing the external potential strength along the direction of the tubes- the system can experience a re-entrant transition between a Mott insulating phase and the superfluid one. Copyright (C) EPLA, 2010

引用

收藏

页数：5

相关论文

共 22 条

[1] Transition from a two-dimensional superfluid to a one-dimensional mott insulator [J].

Bergkvist, Sara ;

Rosengren, Anders ;

Saers, Robert ;

Lundh, Emil ;

Rehn, Magnus ;

Kastberg, Anders .

PHYSICAL REVIEW LETTERS, 2007, 99 (11)

[2]

CETOLI A, 2010, PHYS REV A IN PRESS

[3]

FISHER MPA, 1989, PHYS REV B, V40, P546, DOI 10.1063/1.38820

[4] Superfluid to Bose-Glass Transition in a 1D Weakly Interacting Bose Gas [J].

Fontanesi, Luca ;

Wouters, Michiel ;

Savona, Vincenzo .

PHYSICAL REVIEW LETTERS, 2009, 103 (03)

[5] Mott-insulator phase of coupled one-dimensional atomic gases in a two-dimensional optical lattice [J].

Gangardt, DM ;

Pedri, P ;

Santos, L ;

Shlyapnikov, GV .

PHYSICAL REVIEW LETTERS, 2006, 96 (04)

[6]

Georges A., 2007, P INT SCH PHYS ENR F, V164, P477

[7] Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms [J].

Greiner, M ;

Mandel, O ;

Esslinger, T ;

Hänsch, TW ;

Bloch, I .

NATURE, 2002, 415 (6867) :39-44

[8] Exploring phase coherence in a 2D lattice of Bose-Einstein condensates -: art. no. 160405 [J].

Greiner, M ;

Bloch, I ;

Mandel, O ;

Hänsch, TW ;

Esslinger, T .

PHYSICAL REVIEW LETTERS, 2001, 87 (16)

[9] Berezinskii-Kosterlitz-Thouless crossover in a trapped atomic gas [J].

Hadzibabic, Zoran ;

Kruger, Peter ;

Cheneau, Marc ;

Battelier, Baptiste ;

Dalibard, Jean .

NATURE, 2006, 441 (7097) :1118-1121

[10] Deconfinement in a 2D optical lattice of coupled 1D boson systems [J].

Ho, AF ;

Cazalilla, MA ;

Giamarchi, T .

PHYSICAL REVIEW LETTERS, 2004, 92 (13) :130405-1