Tunable single-photon nonreciprocal scattering and targeted router in a giant atom-waveguide system with chiral couplings. (1st March 2023)

• Record Type: Journal Article
• Authors: Sun, Xue-Jian; Liu, Wen-Xiao; Chen, Hao; Li, Hong-Rong
• Is Part Of: Communications in theoretical physics. Volume 75:Number 3(2023)
• Publication Date: 2023-03-01
• Subjects: three-level giant atom -- chiral waveguide -- nonreciprocal scattering -- single-photon router; Physics -- Periodicals; 530.105
• DOI: 10.1088/1572-9494/acb6ee
• Languages: English
• ISSNs: 0253-6102

Abstract

Abstract: We investigate the single-photon scattering properties of a driven three-level giant atom chirally coupled to two waveguides simultaneously in both the Markovian and the non-Markovian regimes. It is shown that under the Markovian limit, the chiral photon-atom interactions enable nonreciprocal scattering in a single waveguide and targeted photon routing with a probability of 100% in two waveguides, while the presence of the driving field and the giant atom structure introduce a more tunable parameter to manipulate the single-photon scattering behaviors. We also examine how the non-reciprocity and routing capability are influenced by the imperfect chirality and the atomic dissipation. In the non-Markovian regime, we show that the scattering behaviors are more complicated. The non-Markovicity induced non-reciprocity and photon routing are demonstrated in this paper. We believe that those results have potential applications in quantum network engineering.