Atomic Modulation Of Single Photon Scattering In PT Symmetric Cavity Array System With An Even Number Of Cavities As The Scattering Nucleus

Along with the development of science and technology,people have conducted extensive research on the high efficiency of photon transmission in recent years.And more and more high-quality optical microcavity processors have been being used in quantum information processing.Since Bender discovered that the non-Hermitian Hamiltonian also has real eigenvalues in 1998,the PT symmetric cavity array system with good transmission performance has drawn general attention and become a better candidate for photon transmission.The PT symmetrical microcavity array can be prepared by symmetrical adjustment for the microcavity parameters.The transmission of a photonic in the system will perform differently with the cavity parameters and the adjustment of atoms,which provides us with many new ideas.The main content of this paper is the study of the atomic modulation on single photonic scattering in the PT symmetric cavity array system with even-numbered-cavity scattering core.The one-dimensional infinite array coupling with each other is selected as the main model,and the modulation effect of atoms on the single-photon scattering performance is implemented by adjusting the position and number of atoms placed in the scattering nuclear cavities.The characteristics and dynamics of the scattering performance are analyzed by changing the system dissipation and gain,cavity mode frequency,cavity-cavity coupling strength,JC coupling coefficient,atomic energy level difference and other parameters.The research results show that the coupling between atoms and the cavity fields leads to the stable total reflection of the light of a specific wave vector passing through the microcavity array.As the number of coupled atoms increases,the reflection enhancement effect is more significant.When atoms are placed in the dissipative cavity and gain cavity,the coupling between the atoms and the fields has a certain inhibitory effect on the dissipation and gain of the system.Therefore,the scatterer coupled with atoms is equivalent to a "switch",and the modulation of the relevant parameters can control the form of light waves,so that the scatter nuclear switch can control the wave packet transmission more diversely.