Detector-Agnostic Phase-Space Distributions.
Detector-Agnostic Phase-Space Distributions.
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DOI：
10.1103/physrevlett.124.013605
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发表时间：
2019-04
影响因子：
8.6
通讯作者：
J. Sperling;D. Phillips;J. F. F. Bulmer-J.-F.-F.-Bulmer-2255399708;G. Thekkadath;Andreas Eckstein;Tom A. W. Wolterink;J. Lugani;Sae Woo Nam;A. Lita;T. Gerrits;Werner Vogel;Girish S. Agarwal;C. Silberhorn;I. Walmsley
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文献类型：
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作者：
J. Sperling;D. Phillips;J. F. F. Bulmer-J.-F.-F.-Bulmer-2255399708;G. Thekkadath;Andreas Eckstein;Tom A. W. Wolterink;J. Lugani;Sae Woo Nam;A. Lita;T. Gerrits;Werner Vogel;Girish S. Agarwal;C. Silberhorn;I. Walmsley
通过相空间函数表示量子态构成了表征光的一种直观技术。然而，这种分布的重建是具有挑战性的，因为它需要特定类型的探测器及其详细的模型来说明它们的特殊性质和缺陷。为了克服这些障碍，我们推导并实现了一种测量方案，该方案能够重建任意状态的相空间分布，其功能不依赖于检测器的知识，从而定义了与检测器无关的相空间分布的概念。我们的理论推广了著名的相空间准概率分布，如Wigner函数。我们使用最先进的过渡边缘传感器来实施我们的测量协议，而无需执行探测器表征。基于我们的方法，我们揭示了相空间中预言的单光子态和双光子态的特征，并证明了它们具有很高的统计意义的非经典性质。
The representation of quantum states via phase-space functions constitutes an intuitive technique to characterize light. However, the reconstruction of such distributions is challenging as it demands specific types of detectors and detailed models thereof to account for their particular properties and imperfections. To overcome these obstacles, we derive and implement a measurement scheme that enables a reconstruction of phase-space distributions for arbitrary states whose functionality does not depend on the knowledge of the detectors, thus defining the notion of detector-agnostic phase-space distributions. Our theory presents a generalization of well-known phase-space quasiprobability distributions, such as the Wigner function. We implement our measurement protocol, using state-of-the-art transition-edge sensors without performing a detector characterization. Based on our approach, we reveal the characteristic features of heralded single- and two-photon states in phase space and certify their nonclassicality with high statistical significance.