Nonlocal compensation of pure phase objects with entangled photons
Nonlocal compensation of pure phase objects with entangled photons
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DOI：
10.1103/physreva.84.043817
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发表时间：
2011-06
影响因子：
2.9
通讯作者：
S. Cialdi;Davide Brivio;E. Tesio;Matteo G. A. Paris
中科院分区：
文献类型：
--
作者：
S. Cialdi;Davide Brivio;E. Tesio;Matteo G. A. Paris
提出并论证了一种基于双光子偏振态和动量纠缠态的纯相位物体相干非局域补偿方案。在其中一个光束上插入单个相位物体会降低整体检测状态的纯度和共享纠缠的量，而原始纠缠可以通过在另一个光束上添加合适的相位物体来恢复。在我们的装置中，偏振和动量纠缠态是通过自发参量下转换产生的，然后使用可编程空间光调制器进行纯化，该调制器也可以用于对光束施加任意的空间相关相位函数。
We suggest and demonstrate a scheme for coherent nonlocal compensation of pure phase objects based on two-photon polarization and momentum entangled states. The insertion of a single phase object on one of the beams reduces the purity of the overall detected state and the amount of shared entanglement, whereas the original entanglement can be retrieved by adding a suitable phase object on the other beam. In our setup polarization and momentum entangled states are generated by spontaneous parametric downconversion and then purified using a programmable spatial light modulator, which may be also used to impose arbitrary space-dependent phase functions on the beams.