Osterloh K, Baig M, Santos L, Zoller P, Lewenstein M
Institut für Theoretische Physik, Universität Hannover, D-30167 Hannover, Germany.
Phys Rev Lett. 2005 Jul 1;95(1):010403. doi: 10.1103/PhysRevLett.95.010403. Epub 2005 Jun 28.
We demonstrate how to create artificial external non-Abelian gauge potentials acting on cold atoms in optical lattices. The method employs atoms with k internal states, and laser assisted state sensitive tunneling, described by unitary k x k matrices. The single-particle dynamics in the case of intense U2 vector potentials lead to a generalized Hofstadter butterfly spectrum which shows a complex mothlike structure. We discuss the possibility to realize non-Abelian interferometry (Aharonov-Bohm effect) and to study many-body dynamics of ultracold matter in external lattice gauge fields.
我们展示了如何创建作用于光晶格中冷原子的人工外部非阿贝尔规范势。该方法采用具有k个内部态的原子，以及由酉k×k矩阵描述的激光辅助态敏感隧穿。在强U2矢量势的情况下，单粒子动力学导致广义霍夫施塔特蝴蝶谱，其呈现出复杂的蛾状结构。我们讨论了实现非阿贝尔干涉测量（阿哈罗诺夫 - 玻姆效应）以及研究外部晶格规范场中超冷物质多体动力学的可能性。
