Increasing Shannon dimensionality by hyperentanglement of spin and fractional orbital angular momentum.
Increasing Shannon dimensionality by hyperentanglement of spin and fractional orbital angular momentum.
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DOI：
10.1364/ol.34.001855
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发表时间：
2009-06
期刊：
影响因子：
3.6
通讯作者：
Lixiang Chen;W. She
中科院分区：
文献类型：
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作者：
Lixiang Chen;W. She
提出了一种单光子自旋轨道纠缠态分析器，用于研究自发参量下转换（SPDC）过程中孪生光子的自旋和轨道角动量（OAM）态所跨越的希尔伯特空间的有效维数. Pancharatnam-Berry相位元件是分析仪中配备的称为q板的关键元件，它诱导了自旋和OAM之间的耦合。研究发现，自旋轨道超纠缠可以显著增加SPDC中量子通道的Shannon维数。
We propose a single-photon spin-orbit entangled state analyzer for investigating the effective dimensionality of the Hilbert space spanned by spin and orbital angular momentum (OAM) states of twin photons from a spontaneous parametric downconversion (SPDC). The Pancharatnam-Berry phase element, the key element called a q plate equipped in the analyzer, induces the coupling between spin and OAM. It is found that the Shannon dimensionality of quantum channels in SPDC can be evidently increased owing to the spin-orbit hyperentanglement.