Harnessing click detectors for the genuine characterization of light states.
Harnessing click detectors for the genuine characterization of light states.
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DOI：
10.1038/srep19489
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发表时间：
2016-01-14
影响因子：
4.6
通讯作者：
Szameit A
中科院分区：
文献类型：
--
作者：
Heilmann R;Sperling J;Perez-Leija A;Gräfe M;Heinrich M;Nolte S;Vogel W;Szameit A
利用光的量子特性的关键要求是能够检测和计数单个光子。特别令人感兴趣的是光子数分辨探测器，它允许人们确定光状态是经典状态还是真正的量子状态。解决这一挑战的现有方案依赖于光子到电子的成比例转换。因此，它们能够正确表征小光子通量，但受到转换率不确定性的限制。在这项工作中，我们采用分而治之的方法来准确地辨别光态的非经典性。这是通过将入射场转换为均匀的空间分布来实现的，这些空间分布很容易通过标准开关探测器进行表征。由于多路开关探测器中光流的精确统计是点击统计，因此我们的技术原则上可以自由扩展以适应任意大的光子通量。我们的实验为先进片上光子量子网络的真正集成光子数解析检测铺平了道路。
The key requirement for harnessing the quantum properties of light is the capability to detect and count individual photons. Of particular interest are photon-number-resolving detectors, which allow one to determine whether a state of light is classical or genuinely quantum. Existing schemes for addressing this challenge rely on a proportional conversion of photons to electrons. As such, they are capable of correctly characterizing small photon fluxes, yet are limited by uncertainties in the conversion rate. In this work, we employ a divide-and-conquer approach to infallibly discerning non-classicality of states of light. This is achieved by transforming the incident fields into uniform spatial distributions that readily lend themselves for characterization by standard on-off detectors. Since the exact statistics of the light stream in multiplexed on-off detectors are click statistics, our technique is freely scalable to accommodate–in principle–arbitrarily large photon fluxes. Our experiments pave the way towards genuine integrated photon-number-resolving detection for advanced on-chip photonic quantum networks.