High-photon-number path entanglement in the interference of spontaneously down-converted photon pairs with coherent laser light
High-photon-number path entanglement in the interference of spontaneously down-converted photon pairs with coherent laser light
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DOI：
10.1103/physreva.76.031806
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发表时间：
2007-09-01
影响因子：
2.9
通讯作者：
Ono, Takafumi
中科院分区：
文献类型：
--
作者：
Hofmann, Holger F.;Ono, Takafumi
我们发现，下转换光子对和相干激光光子之间的量子干涉可以产生一个最大路径纠缠的N光子输出分量，保真度大于90%，对于任意高的光子数。因此，简单的分束器操作可以将下转换光的双光子相干性转换为几乎最佳的N光子相干性。
We show that the quantum interference between down-converted photon pairs and photons from coherent laser light can produce a maximally path entangled N-photon output component with a fidelity greater than 90% for arbitrarily high photon numbers. A simple beam splitter operation can thus transform the two-photon coherence of down-converted light into an almost optimal N-photon coherence.