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arXiv 1407.0144quant-ph
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单光子不同自由度间可调纠缠的产生和Bell不等式的破坏

Generation of tunable entanglement and violation of a Bell-like inequality between different degrees of freedom of a single photon

Adam Valles, Vincenzo D'Ambrosio, Martin Hendrych, Michal Micuda, Lorenzo Marrucci, Fabio Sciarrino, Juan P. Torres

摘要:

我们展示了一个方案,以产生非相干和相干相关,即,在单个光子的自由度之间的可调纠缠度。它的性质类似于通过调整成对光子之间的相关性来调谐形成双光子状态的一部分的单个光子的纯度(一阶相干性)。因此,众所周知的工具,如Clauser-Horne-Shimony-Holt(CHSH)Bell-like不等式也可以用来表征自由度之间的纠缠。更具体地说,CHSH不等式测试进行,利用单个光子的偏振和空间形状。所需的四种模式是两种偏振模式和两种具有不同轨道角动量的空间模式。

英文摘要:

We demonstrate a scheme to generate noncoherent and coherent correlations, i.e., a tunable degree of entanglement, between degrees of freedom of a single photon. Its nature is analogous to the tuning of the purity (first-order coherence) of a single photon forming part of a two-photon state by tailoring the correlations between the paired photons. Therefore, well-known tools such as the Clauser-Horne-Shimony-Holt (CHSH) Bell-like inequality can also be used to characterize entanglement between degrees of freedom. More specifically, CHSH inequality tests are performed, making use of the polarization and the spatial shape of a single photon. The four modes required are two polarization modes and two spatial modes with different orbital angular momentum.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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