关键词: 四体耦合腔阵列, PT相变, 单光子传输

Abstract: We considered a fourbody coupled cavity array with symmetric gain and dissipation, and analyzed the PT phase transition and the single photon transmission of the system. The results show that the system can be in thePT symmetric phase and the PTsymmetric broken phase according to different parameter ranges, which the photons are located in different cavities, and the single photon transmission is bidirectional.

Key words:  , fourbody coupled cavity array, PT phase transition, single photon transmission