Quantum phase transition of ultracold bosons in double-well optical lattices

被引：3

作者：

Danshita, I. ^{[1
,2
,3
]}

Williams, J. E. ^{[4
]}

de Melo, C. A. R. Sa ^{[1
,2
,5
]}

Clark, C. W. ^{[1
,2
]}

机构：

[1] NIST, Joint Quantum Inst, Gaithersburg, MD 20899 USA

[2] Univ Maryland, Gaithersburg, MD 20899 USA

[3] Waseda Univ, Dept Phys, Shinjuku Ku, Tokyo 1698555, Japan

[4] Wolfram Res Inc, Champaign, IL 61820 USA

[5] Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA

来源：

LASER PHYSICS | 2008年 / 18卷 / 03期

关键词：

D O I：

10.1134/S1054660X08030213

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the superfluid-to-Mott insulator transition of bosons in a two-legged ladder optical lattice of a type accessible in current experiments on double-well optical lattices. The zero-temperature phase diagram is mapped out, with a focus on its dependence upon interchain hopping and the tilt between double wells. We find that the unit-filling Mott phase exhibits a nonmonotonic behavior as a function of the tilt parameter, producing a reentrant phase transition between the Mott insulator and superfluid phases.

引用

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页码：318 / 321

页数：4

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