摘要
A scheme is proposed to investigate the non-classical states generated by a quantum scissors device(QSD) operating on the the cavity mode of an optomechanical system. When the catalytic QSD acts on the cavity mode of the optomechanical system, the resulting state contains only the vacuum, single-photon and two-photon states depending upon the coupling parameter of the optomechanical system as well as the transmission coefficients of beam splitters(BSs). Especially, the output state is just a class of multicomponent cat state truncations at time t = 2π by choosing the appropriate value of coupling parameter. We discuss the success probability of such a state and the fidelity between the output state and input state via QSD. Then the linear entropy is used to investigate the entanglement between the two subsystems, finding that QSD operation can enhance their entanglement degree. Furthermore, we also derive the analytical expression of the Wigner function(WF) for the cavity mode via QSD and numerically analyze the WF distribution in phase space at time t =2π. These results show that the high non-classicality of output state can always be achieved by modulating the coupling parameter of the optomechanical system as well as the transmittance of BSs.
作者
李恒梅
杨保华
袁洪春
许业军
Heng-Mei Li;Bao-Hua Yang;Hong-Chun Yuan;Ye-Jun Xu(School of Information Engineering,Changzhou Vocational Institute of Mechatronic Technology,Changzhou 213164,China;School of Electrical and Information Engineering,Changzhou Institute of Technology,Changzhou 213032,China;School of Mechanical and Electronic Engineering,Chizhou University,Chizhou 247000,China)
基金
Project supported by the National Natural Science Foundation of China (Grant No.11704051)
the Qinglan Project of the Jiangsu Education Department and the Research Foundation of Six Talents Peaks Project in Jiangsu Province,China (Grant No.XNY-093)。
