Shannon dimensionality of quantum channels and its application to photon entanglement.
Shannon dimensionality of quantum channels and its application to photon entanglement.
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DOI：
10.1103/physrevlett.101.120502
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发表时间：
2008-08
影响因子：
8.6
通讯作者：
J. Pors;S. Oemrawsingh;A. Aiello;M. P. V. Exter;E. Eliel;G. Hooft;J. Woerdman
中科院分区：
文献类型：
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作者：
J. Pors;S. Oemrawsingh;A. Aiello;M. P. V. Exter;E. Eliel;G. Hooft;J. Woerdman
我们引入香农维数D的概念作为一种新的方式来量化实验中测量的二分纠缠。这是适用于两个光子的轨道角动量纠缠，使用两个状态分析器组成的可旋转的角扇区相位板的透镜耦合到一个单模光纤。我们可以从所观察到的双光子符合条纹直接推导出D值。在我们的实验中，D在2和6之间变化，这取决于实验条件。我们预测香农维数如何演变时，印在相位板的角扇区的数量增加，并预计D约50是实验范围内。
We introduce the concept of Shannon dimensionality D as a new way to quantify bipartite entanglement as measured in an experiment. This is applied to orbital-angular-momentum entanglement of two photons, using two state analyzers composed of a rotatable angular-sector phase plate that is lens coupled to a single-mode fiber. We can deduce the value of D directly from the observed two-photon coincidence fringe. In our experiment, D varies between 2 and 6, depending on the experimental conditions. We predict how the Shannon dimensionality evolves when the number of angular sectors imprinted in the phase plate is increased and anticipate that D approximately 50 is experimentally within reach.