Experimental preparation of quadripartite cluster and Greenberger-Horne-Zeilinger entangled states for continuous variables
Experimental preparation of quadripartite cluster and Greenberger-Horne-Zeilinger entangled states for continuous variables
复制标题
连续变量四分簇和 Greenberger-Horne-Zeilinger 纠缠态的实验准备
DOI：
10.1103/physrevlett.98.070502
复制
发表时间：
2007-02-16
影响因子：
8.6
通讯作者：
Peng, Kunchi
中科院分区：
文献类型：
--
作者：
Su, Xiaolong;Tan, Aihong;Peng, Kunchi
团簇态和Greenberger-Horne-Zeilinger（GHZ）态是两种不同类型的多体量子纠缠态。本文首次给出了产生连续变量四体团簇和电磁场GHZ纠缠态的实验结果。利用光的两个振幅正交压缩态和两个相位正交压缩态，通过线性光学变换，在实验上产生了振幅正交和相位正交的两种纠缠态。所测得的正交方差的组合证明了所生成的四个子系统的完全不可分离性。所提出的实验方案表明，连续变量的多体纠缠可以确定性地产生与相对简单的实现。
The cluster states and Greenberger-Horne-Zeilinger (GHZ) states are two different types of multipartite quantum entangled states. We present the first experimental results generating continuous variable quadripartite cluster and GHZ entangled states of electromagnetic fields. Utilizing two amplitude-quadrature and two phase-quadrature squeezed states of light and linearly optical transformations, the two types of entangled states for amplitude and phase quadratures of light are experimentally produced. The combinations of the measured quadrature variances prove the full inseparability of the generated four subsystems. The presented experimental schemes show that the multipartite entanglement of continuous variables can be deterministically generated with the relatively simple implementation.