Versatile photon gateway based on controllable multiphoton blockade
作者单位：同济大学 MOE Key Laboratory of Advanced Micro-Structured MaterialsSchool of Physics Science and EngineeringTongji University
会议名称：《第十八届全国量子光学学术会议》
会议日期：2018年
学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学]
摘 要：Combining the Raman-EIT technique with this two atoms cavity QED system, we show in this work that the multiphoton blockade behavior can be optically controlled by an external control field. We note that a similar scheme has already been experimentally studied where a single atom is trapped in the cavity and the control field is resonant with the cavity to form an EIT configuration. However, we find many interesting features of the photon blockade associated with the collective radiations in this Raman EIT configuration that a single atom and the EIT scheme do not possess. Choosing a specific pump field frequency, we show that the property of the photons leaking from the cavity can be changed from bunching to anti-bunching behavior by tuning the control field Rabi frequency. We further show that, in the case of in-phase radiations, the two-photon blockade can be changed to three-photon blockade by just varying the control field intensity. Therefore, it is possible to actively control the photon emissions in this system. Based on these characteristics, we show that a versatile photon gateway can be realized in our system, which can be achieved in experiments with current experimental conditions.