Controllable Non-Reciprocal Transmission Of Single Photon In Mobius Structure

A controllable non-reciprocal transmission model is proposed. The model contains a Mobius ring, which is connected with two 1D semi-infinite chains, with a two-level atom located inside one of the cavities of the Mobius 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.