Deterministic state analysis for polarization-spatial-time-bin hyperentanglement with nonlinear optics
Deterministic state analysis for polarization-spatial-time-bin hyperentanglement with nonlinear optics
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DOI：
10.1088/1612-202x/aaea73
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发表时间：
2018-11
影响因子：
1.7
通讯作者：
Meiyu Wang;Fengli Yan;Ting Gao
中科院分区：
文献类型：
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作者：
Meiyu Wang;Fengli Yan;Ting Gao
我们提出了两种确定性的超纠缠态分析方案，用于偏振态、空间模态和时库自由度的光子纠缠态。第一种协议是超纠缠贝尔状态分析仪，第二种协议是超纠缠格林伯格-霍恩-塞林格（GHZ）三光子状态分析仪。在第一种方案中，我们构造了一个偏振奇偶校验量子不拆除探测器（P-QND）和一个基于交叉克尔非线性的空间模奇偶校验量子不拆除探测器（S-QND）。利用这些P-QND和S-QND，我们设计了贝尔状态分析仪在偏振和空间模dof下的设置。而时间盒纠缠则是借助偏振纠缠来判别的。我们将这一思想推广到分析三光子超纠缠GHZ态。在每个方案中，通过三个步骤完全判别出一组相互正交的超纠缠基态。这两种状态分析方案有望为高容量、远距离量子通信提供实际应用。
We present two deterministic hyperentangled state analysis protocols for photons entangled in polarization, spatial-mode and time-bin degrees of freedom (DOFs). The first protocol is a hyperentangled Bell state analyzer, and the second is a hyperentangled Greenberger–Horne–Zeilinger (GHZ) state analyzer for three photons. In the first scheme, we construct a polarization parity-check quantum nondemolition detector (P-QND) and a spatial-mode parity-check quantum nondemolition detector (S-QND) based on cross-Kerr nonlinearities. With these P-QND and S-QND, we design the setup of Bell state analyzer in polarization and spatial-mode DOFs. While time-bin entanglement is discriminated with the help of the polarization entanglement. We generalize the idea to analyze the three-photon hyperentangled GHZ states. In each scheme, a set of mutually orthogonal hyperentangled basis states are completely discriminated via three steps. These two state analysis schemes are expected to provide practical applications for high-capacity and long-distance quantum communication.