Robust long-distance entanglement and a loophole-free bell test with ions and photons.
Robust long-distance entanglement and a loophole-free bell test with ions and photons.
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DOI：
10.1103/physrevlett.91.110405
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发表时间：
2003-03
影响因子：
8.6
通讯作者：
C. Simon;W. Irvine
中科院分区：
文献类型：
--
作者：
C. Simon;W. Irvine
在纠缠态的基础上，通过联合检测两个光子，每个光子来自其中一个离子，相距几公里的两个被困离子可以纠缠在一起。这样的检测对于线性光学元件是可能的。双光子干涉的使用使得纠缠分布对光子的路径长度没有干涉敏感。目前产生纠缠离子的方法也为贝尔不等式的无漏洞测试打开了可能性。
Two trapped ions that are kilometers apart can be entangled by the joint detection of two photons, each coming from one of the ions, in a basis of entangled states. Such a detection is possible with linear optical elements. The use of two-photon interference allows entanglement distribution free of interferometric sensitivity to the path length of the photons. The present method of creating entangled ions also opens up the possibility of a loophole-free test of Bell's inequalities.