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arXiv 2010.09604quant-ph
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两个间接耦合能级间的非互易跃迁

Nonreciprocal transition between two indirectly coupled energy levels

Xun-Wei Xu, Hai-Quan Shi, Ai-Xi Chen

摘要:

提出了一种实现两个不能直接耦合的能级间非互易跃迁的理论方案。假设它们通过两个辅助能级间接耦合,形成一个循环四能级结构,并且循环结构中的四个跃迁受外场控制。当合成磁通量破坏系统的时间反演对称性时,间接跃迁变为非互易,即,通过循环四能级结构的外部驱动场的总相位。通过消除自发发射光谱中的谱线可以识别非互易跃迁。我们的工作为在大范围的多能级系统中观察非互易跃迁提供了一种可行的方法,包括具有宇称对称性的自然原子或离子。

英文摘要:

We propose a theoretical scheme to realize nonreciprocal transition between two energy levels that can not coupled directly. Suppose they are coupled indirectly by two auxiliary levels with a cyclic four-level configuration, and the four transitions in the cyclic configuration are controlled by external fields. The indirectly transition become nonreciprocal when the time reversal symmetry of the system is broken by the synthetic magnetic flux, i.e., the total phase of the external driving fields through the cyclic four-level configuration. The nonreciprocal transition can be identified by the elimination of a spectral line in the spontaneous emission spectrum. Our work introduces a feasible way to observe nonreciprocal transition in a wide range of multi-level systems, including natural atoms or ions with parity symmetry.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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