Correlated imaging, quantum and classical
Correlated imaging, quantum and classical
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DOI：
10.1103/physreva.70.013802
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发表时间：
2004-07-01
影响因子：
2.9
通讯作者：
Lugiato, LA
中科院分区：
文献类型：
--
作者：
Gatti, A;Brambilla, E;Lugiato, LA
我们的分析表明，利用非相干热辐射分裂得到的两束光束的经典关联来实现相干成像是可能的。给出了两束经典关联光束和两束由参数下转换产生的纠缠光束之间的形式类比。由于这种类比，经典光束可以定性地模拟纠缠光束的所有成像特性，即使是以到目前为止还不可能实现的方式。一个关键特征是这些经典光束在近场和远场都是空间相关的。使用真实的数值模拟表明，准热源和参数下变换源的性能非常相似，都涉及到分辨率和统计特性。本文的结果为讨论纠缠在相关成像中所起的作用提供了一个场景。
We analytically show that it is possible to perform coherent imaging by using the classical correlation of two beams obtained by splitting incoherent thermal radiation. A formal analogy is demonstrated between two such classically correlated beams and two entangled beams produced by parametric down-conversion. Because of this analogy, the classical beams can mimic qualitatively all the imaging properties of the entangled beams, even in ways which up to now were not believed possible. A key feature is that these classical beams are spatially correlated both in the near field and in the far field. Using realistic numerical simulations the performances of a quasithermal and a parametric down-conversion source are shown to be closely similar, both for what concerns the resolution and statistical properties. The results of this paper provide a scenario for the discussion of what role the entanglement plays in correlated imaging.