A controllable non-reciprocal transmission model is proposed. The model contains a Möbius ring, which is connected with two 1D semi-infinite chains, with a two-level atom located inside one of the cavities of the Möbius ring. The Green function method is used to study the transmittance of a single photon through the model. The results show that non-reciprocal transmission can be achieved in this model and the two-level atom can behave as a quantum switch for non-reciprocal transport of the single photon. This controllable non-reciprocal transmission model may inspire new quantum non-reciprocal devices.

中文翻译：

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莫比乌斯结构中单光子的可控非互易传输

提出了一种可控的非互易传输模型。该模型包含一个莫比乌斯环，它与两个一维半无限链相连，一个两级原子位于莫比乌斯环的一个空腔内。格林函数法用于研究单个光子通过模型的透射率。结果表明，该模型可以实现非互易传输，两能级原子可以作为单光子非互易传输的量子开关。这种可控的非互易传输模型可能会激发新的量子非互易器件。