One-dimensional phase transitions in a two-dimensional optical lattice

被引：0
|
作者：
M. Rehn
S. Bergkvist
A. Rosengren
R. Saers
M. Zelán
E. Lundh
A. Kastberg
机构：
[1] Umeå University,Department of Physics
[2] University of KwaZulu-Natal,Quantum Research Group, School of Physics
[3] AlbaNova University Center,Condensed Matter Theory, Department of Theoretical Physics
[4] KTH,NORDITA
[5] AlbaNova University Center,undefined
来源：
The European Physical Journal D | 2008年 / 49卷
关键词：
05.30.Jp Boson systems; 03.75.Lm Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations; 67.90.+z Other topics in quantum fluids and solids;
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摘要：
A phase transition for bosonic atoms in a two-dimensional anisotropic optical lattice is considered. If the tunnelling rates in two directions are different, the system can undergo a transition between a two-dimensional superfluid and a one-dimensional Mott insulating array of strongly coupled tubes. The connection to other lattice models is exploited in order to better understand the phase transition. Critical properties are obtained using quantum Monte Carlo calculations. These critical properties are related to correlation properties of the bosons and a criterion for commensurate filling is established.
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页码：223 / 230
页数：7
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