Z2 Topological Insulators in Ultracold Atomic Gases

被引：67

作者：

Beri, B. ^{[1
]}

Cooper, N. R. ^{[1
]}

机构：

[1] Univ Cambridge, Cavendish Lab, TCM Grp, Cambridge CB3 0HE, England

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 14期

基金：

英国工程与自然科学研究理事会;

关键词：

PHYSICS;

D O I：

10.1103/PhysRevLett.107.145301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We describe how optical dressing can be used to generate band structures for ultracold atoms with nontrivial Z(2) topological order. Time-reversal symmetry is preserved by simple conditions on the optical fields. We first show how to construct optical lattices that give rise to Z(2) topological insulators in two dimensions. We then describe a general method for the construction of three-dimensional Z(2) topological insulators. A central feature of our approach is a new way to understand Z(2) topological insulators starting from the nearly free electron limit.

引用

页数：5

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