在光学参量振荡器中直接产生空间四部分连续变量纠缠。

Direct generation of spatial quadripartite continuous variable entanglement in an optical parametric oscillator.

作者信息

Liu Kui, Guo Jun, Cai Chunxiao, Zhang Junxiang, Gao Jiangrui

出版信息

Opt Lett. 2016 Nov 15;41(22):5178-5181. doi: 10.1364/OL.41.005178.

DOI:10.1364/OL.41.005178

PMID:27842087

Abstract

Multipartite entanglement is used for quantum information applications, such as building multipartite quantum communications. Generally, generation of multipartite entanglement is based on a complex beam-splitter network. Here, based on the spatial freedom of light, we experimentally demonstrated spatial quadripartite continuous variable entanglement among first-order Hermite-Gaussian modes using a single type II optical parametric oscillator operating below threshold with an HG0245° pump beam. The entanglement can be scalable for larger numbers of spatial modes by changing the spatial profile of the pump beam. In addition, spatial multipartite entanglement will be useful for future spatial multichannel quantum information applications.

摘要

多体纠缠用于量子信息应用，例如构建多体量子通信。一般来说，多体纠缠的产生基于复杂的分束器网络。在此，基于光的空间自由度，我们利用一个在阈值以下工作的单台Ⅱ型光学参量振荡器和一束HG02 45°泵浦光束，通过实验证明了一阶厄米 - 高斯模式之间的空间四体连续变量纠缠。通过改变泵浦光束的空间分布，这种纠缠可以扩展到更多的空间模式。此外，空间多体纠缠将对未来的空间多通道量子信息应用有用。