Continuous variable spin–orbit total angular momentum entanglement on the higher-order Poincaré sphere
Authors:Hui Guo, Na Liu, Hengxin Sun, Kui Liu, and Jiangrui Gao
本文研究了光参量下变换过程中的自旋轨道全角动量纠缠。利用色散和散光补偿的单光参量振荡器,实验直接产生了四对纠缠矢量涡旋模,并首次在量子高阶庞加莱球上刻画了自旋轨道量子态,并证明了自旋轨道全角动量Stokes纠缠关系。这些态在高维量子通信和多参数测量中具有潜在的应用。
Generation of continuous-variable high-dimensional entanglement with three degrees of freedom and multiplexing quantum dense coding
Authors:Hui Guo, Na Liu, Zhi Li, Rongguo Yang, Hengxin Sun, Kui Liu, Jiangrui Gao
本文报道了由单个II型光学参量振荡器(OPO)腔直接产生的具有三个自由度(频率、偏振和轨道角动量)的连续变量高维纠缠。通过补偿频率模式中的色散和高阶横模中的散射,OPO能够同时振荡并输出数千个纠缠对。通过14对Hermite-Gaussian模式相关测量,验证了三自由度高维纠缠同时具有频率梳、自旋和轨道角动量纠缠。然后,利用纠缠资源还证明了“空频”复用量子密集编码通信。它显示了高维量子纠缠在实现大容量量子任务方面的巨大优势。
Generation of a continuous-variable quadripartite cluster state multiplexed in the spatial domain
Authors:Chunxiao Cai, Long Ma, Juan Li, Hui Guo, Kui Liu, Hengxin Sun, Rongguo Yang, Jiangrui Gao
在高度纠缠网络当中,cluster态在更大的信息容量和基于测量的量子计算当中具有潜在应用价值。这里我们报道了在单个光学参量振荡器中产生连续变量四组份空间正交模式cluster态,并且通过优化泵浦模式进一步提高了纠缠质量。与基模泵浦进行对比,使用最佳泵浦模式增强了33%。我们的方法可以拓展到空间领域当中。这种空间四组份cluster态有望应用于未来的空间量子信息处理的方案。
Experimental characterization of continuous-variable orbital angular momentum entanglement using Stokes-operator basis
Authors:Chunxiao Cai, Long Ma, Juan Li, Hui Guo, Kui Liu, Hengxin Sun, Jiangrui Gao
Experimental Generation of Continuous-Variable Hyperentanglement in an Optical Parametric Oscillator
Authors:Kui Liu, Jun Guo, Chunxiao Cai, Shuaifeng Guo, and Jiangrui Gao
光学参量振荡器被广泛地用来产生连续变量非经典光源。对于单模非经典光场,科研人员通过理论与实验上相结合,将其应用在连续变量量子信息协议 和高灵敏光学测量当中,随着量子信息协议复杂度的增加,量子信道多路复用应运而生,其中就用到多模非经典光场。
Measurement of Stokes-operator squeezing for continuous-variable orbital angular momentum
Authors:Jun Guo, Chunxiao Cai, Long Ma, Kui Liu, Hengxin Sun, and Jiangrui Gao
Higher order mode entanglement in a type II optical parametric oscillator
Authors:Jun Guo, Chunxiao Cai, Long Ma, Kui Liu, Hengxin Sun, and Jiangrui Gao
Direct generation of spatial quadripartite continuous variable entanglement in an optical parametric oscillator
Authors:Kui Liu,Jun Guo,Chunxiao Cai,Junxiang Zhang,and Jiangrui Gao