连续变量六组份和八组份星型Cluster纠缠态光场产生系统  

Generation System of Continuous-Variable Six-Partite and Eight-Partite Star Cluster Entangled States

作　　者：赵亚平[1] 郝树宏[1] 苏晓龙[1] 谢常德[1] 

机构地区：[1]山西大学光电研究所量子光学与光量子器件国家重点实验室,山西太原030006

出　　处：《光学学报》2012年第6期224-231,共8页Acta Optica Sinica

基　　金：国家973计划(2010CB923103);国家自然科学基金(11174188;60736040;10804065;60821004)资助课题

摘　　要：Cluster纠缠态是执行单向量子计算的基本资源。星型Cluster态可用于构建量子信息网络。以非简并光学参变放大器产生的双模压缩态光场为基础,设计了产生连续变量六组份和八组份星型Cluster纠缠态光场的实验方案,并推导了相应的量子不可分判据。计算结果指出,当量子不可分判据中的增益因子取为1时,需要一定的初始压缩度才能制备星型Cluster纠缠态;但当选取最佳增益因子时,极低的压缩也能产生星型纠缠。计算为实验系统设计提供了直接参考。Cluster entangled state is the fundamental resource of one-way quantum computation.Star Cluster state can be applied to build quantum network.Based on two-mode squeezing states generated by nondegenerate optical parametric amplifiers an experimental generation scheme of continuous-variable six-partite and eight-partite star Cluster entangled states is designed,and the corresponding quantum inseparability criteria is deduced.The calculation results show that when the gain factors in inseparability criteria is set to be 1,Cluster entanglement should be prepared with some initial squeezing.But when optimal gain factors are chosen,star Cluster entanglement can be demonstrated with low squeezing.The calculation provides a direct reference for designing experimental system.

关 键 词：量子光学 量子计算 Cluster纠缠态 连续变量 

分 类 号：O431.2[机械工程—光学工程]