Unconventional photon blockade in a three-mode system with double second-order nonlinear coupling  

作　　者：Hong-Yu Lin Hui Yang Zhi-Hai Yao 林宏宇;杨慧;姚治海(Department of Physics,Changchun University of Science and Technology,Changchun 130022,China;College of Physics and Electronic Information,Baicheng Normal University,Baicheng 137000,China)

机构地区：[1]Department of Physics,Changchun University of Science and Technology,Changchun 130022,China [2]College of Physics and Electronic Information,Baicheng Normal University,Baicheng 137000,China

出　　处：《Chinese Physics B》2020年第12期152-158,共7页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.11647054);the Natural Science Foundation of Jilin Province,China(Grant No.JJKH20181088KJ)。

摘　　要：The unconventional photon blockade(UPB)for low-frequency mode is investigated in a three-mode system with double second-order nonlinearity.By analyzing the Hamiltonian of the system,the optimal analytic condition of UPB in low-frequency mode is obtained.The numerical results are calculated by solving the master equation in a truncated Fock space,which agrees well with the analytic conditions.Through the numerical analysis of the system,it is found that the weak driving strength is favorable for the system to realize the UPB effect,and the system is insensitive to the changes of attenuation rate and environmental temperature.The comparison with the two-mode system and another similar threemode system shows that,under similar system parameters,the UPB effect of this double two-order nonlinear system is more obvious.

关 键 词：unconventional photon blockade second-order nonlinearity quantum interference 

分 类 号：O413.2[理学—理论物理]