Controllable non-reciprocal transmission of single photon in Mobius structure

TL;DR

This paper introduces a model with a Mobius ring and a two-level atom that enables controllable non-reciprocal single-photon transmission, potentially leading to new quantum non-reciprocal devices.

Contribution

It presents a novel Mobius ring-based model with a two-level atom for controllable non-reciprocal photon transport, analyzed using Green function methods.

Findings

Non-reciprocal transmission achieved in the model

Two-level atom acts as a quantum switch

Model may inspire new quantum non-reciprocal devices

Abstract

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