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arXiv 1604.06149cond-mat.mes-hall
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非阿贝尔规范场在p型半导体系统中的表现

Manifestation of a non-abelian gauge field in a p-type semiconductor system

T. Li, L. A. Yeoh, A. Srinivasan, O. Klochan, D. A. Ritchie, M. Y. Simmons, O. P. Sushkov, A. R Hamilton

摘要:

规范理论虽然描述了自然界中的基本相互作用,但也出现在各种物理系统中。阿贝尔规范场已经在许多新颖的量子多体系统、拓扑绝缘体、超冷原子等中被预言和观测到。然而,非阿贝尔规范场虽然在粒子物理学中起着最基本的作用,但到目前为止仍然是多体物理学中的纯理论结构。本文报道在自旋轨道耦合量子系统中首次观测到非阿贝尔规范场。规范场表现在空穴掺杂的二维GaAs异质结构的量子磁振荡中。输运测量是在倾斜磁场中进行的,其中,非阿贝尔规范场的出射效应由二维平面中的磁场的分量控制。

英文摘要:

Gauge theories, while describing fundamental interactions in nature, also emerge in a wide variety of physical systems. Abelian gauge fields have been predicted and observed in a number of novel quantum many-body systems, topological insulators, ultracold atoms and many others. However, the non-abelian gauge field, while playing the most fundamental role in particle physics, up to now has remained a purely theoretical construction in many-body physics. In the present paper we report the first observation of a non-abelian gauge field in a spin-orbit coupled quantum system. The gauge field manifests itself in quantum magnetic oscillations of a hole doped two-dimensional (2D) GaAs heterostructure. Transport measurements were performed in tilted magnetic fields, where the effect of the emergent non-abelian gauge field was controlled by the components of the magnetic field in the 2D plane.

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