Realistic Time-Reversal Invariant Topological Insulators with Neutral Atoms
Realistic Time-Reversal Invariant Topological Insulators with Neutral Atoms
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DOI：
10.1103/physrevlett.105.255302
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发表时间：
2010-12-16
影响因子：
8.6
通讯作者：
Spielman, I. B.
中科院分区：
文献类型：
--
作者：
Goldman, N.;Satija, I.;Spielman, I. B.
我们开展了在碱性原子气体中实现时间反转不变拓扑绝缘体的实验。我们介绍了一种在原子芯片近场中合成规范场的新颖方法，该方法有效地模拟了自旋-轨道耦合的影响，并产生了量子自旋-霍尔态。我们还提出了一个可行的方案来设计尖锐的边界，在那里标志边缘状态是局部化的。我们的多带系统有一个很大的参数空间，表现出拓扑相和正常绝缘相之间的各种量子相变。冷原子系统由于其显著的通用性，非常适合于实现物质的拓扑态，并推动拓扑量子计算的发展。
We lay out an experiment to realize time-reversal invariant topological insulators in alkali atomic gases. We introduce an original method to synthesize a gauge field in the near field of an atom chip, which effectively mimics the effects of spin-orbit coupling and produces quantum spin-Hall states. We also propose a feasible scheme to engineer sharp boundaries where the hallmark edge states are localized. Our multiband system has a large parameter space exhibiting a variety of quantum phase transitions between topological and normal insulating phases. Because of their remarkable versatility, cold-atom systems are ideally suited to realize topological states of matter and drive the development of topological quantum computing.