Transmission of quantum entanglement through a random medium
Transmission of quantum entanglement through a random medium
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通过随机介质传输量子纠缠
DOI：
10.1209/0295-5075/107/54004
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
S. Skipetrov
中科院分区：
文献类型：
--
作者：
Manutea Candé;A. Goetschy;S. Skipetrov
我们研究了通过随机介质传输的光子对的高维纠缠。我们发现，多重散射与随后只选择一小部分出射模式相结合，降低了初始最大纠缠双光子态的平均纠缠。当传输中可访问的模数远低于入射光中的模数时，可获得与随机纯态相对应的纠缠。接近入射光的纠缠量可以通过访问更多的传输模式来恢复。相反，一对处于可分离状态的光子在通过随机介质传输时不会获得任何纠缠。
We study the high-dimensional entanglement of a photon pair transmitted through a random medium. We show that multiple scattering in combination with the subsequent selection of only a fraction of outgoing modes reduces the average entanglement of an initially maximally entangled two-photon state. Entanglement corresponding to a random pure state is obtained when the number of modes accessible in transmission is much lower than the number of modes in the incident light. An amount of entanglement approaching that of the incident light can be recovered by accessing a larger number of transmitted modes. In contrast, a pair of photons in a separable state does not gain any entanglement when transmitted through a random medium.