Zoo of quantum phases and excitations of cold bosonic atoms in optical lattices

被引：66

作者：

Alon, OE ^{[1
]}

Streltsov, AI ^{[1
]}

Cederbaum, LS ^{[1
]}

机构：

[1] Univ Heidelberg, Inst Phys Chem, D-69120 Heidelberg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.95.030405

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Quantum phases and phase transitions of weakly to strongly interacting bosonic atoms in deep to shallow optical lattices are described by a single multiorbital mean-field approach in real space. For weakly interacting bosons in one dimension, the critical value of the superfluid to Mott insulator (MI) transition found is in excellent agreement with many-body treatments of the Bose-Hubbard model. For strongly interacting bosons, (i) additional MI phases appear, for which two (or more) atoms residing in each site undergo a Tonks-Girardeau-like transition and localize, and (ii) on-site excitation becomes the excitation lowest in energy. Experimental implications are discussed.

引用

页数：4

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