Photon blockade in a cavity–atom optomechanical system

【摘要】 We study the single-photon blockade(1 PB), two-photon blockade(2 PB), and photon-induced tunneling(PIT) effects in a cavity–atom optomechanical system in which a two-level atom is coupled to a single-model cavity field via a twophoton interaction. By analyzing the eigenenergy spectrum of the system, we obtain a perfect 1 PB with a high occupancy probability of single-photon excitation, which means that a high-quality and efficient single-photon source can be generated.However, PIT often occurs in many cases when we consider 2 PB in analogy to 1 PB. In addition, we find that a 2 PB region will present in the optomechanical system, which can be proved by calculating the correlation function of the model analytically.更多还原

【Abstract】 We study the single-photon blockade(1 PB), two-photon blockade(2 PB), and photon-induced tunneling(PIT) effects in a cavity–atom optomechanical system in which a two-level atom is coupled to a single-model cavity field via a twophoton interaction. By analyzing the eigenenergy spectrum of the system, we obtain a perfect 1 PB with a high occupancy probability of single-photon excitation, which means that a high-quality and efficient single-photon source can be generated.However, PIT often occurs in many cases when we consider 2 PB in analogy to 1 PB. In addition, we find that a 2 PB region will present in the optomechanical system, which can be proved by calculating the correlation function of the model analytically.更多还原