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

被引：2

作者：

Rehn, M. ^{[1
,2
]}

Bergkvist, S. ^{[3
]}

Rosengren, A. ^{[3
,4
]}

Saers, R. ^{[1
]}

Zelan, M. ^{[1
]}

Lundh, E. ^{[1
]}

Kastberg, A. ^{[1
]}

机构：

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

[2] Univ KwaZulu Natal, Sch Phys, Quantum Res Grp, ZA-4000 Durban, South Africa

[3] AlbaNova Univ Ctr, Dept Theoret Phys, KTH, S-10691 Stockholm, Sweden

[4] AlbaNova Univ Ctr, NORDITA, S-10691 Stockholm, Sweden

来源：

EUROPEAN PHYSICAL JOURNAL D | 2008年 / 49卷 / 02期

基金：

瑞典研究理事会;

关键词：

D O I：

10.1140/epjd/e2008-00152-9

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

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.

引用

页码：223 / 230

页数：8

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