Optimal Imaging of Remote Bodies Using Quantum Detectors
Optimal Imaging of Remote Bodies Using Quantum Detectors
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DOI：
10.1103/physrevlett.123.143604
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发表时间：
2019-09-30
影响因子：
8.6
通讯作者：
White, A. G.
中科院分区：
文献类型：
--
作者：
Howard, L. A.;Gillett, G. G.;White, A. G.
我们通过使用线性光学和光子数分辨探测器测量相干的复杂程度来实现通用成像方法。在缺乏集体或纠缠辅助测量的情况下，我们的方法在复杂相干度的大范围实际相关值上是最佳的。我们测量了一个小的远距离赝热光源的尺寸和位置，并表明我们的方法在精度上优于传统成像方法一个数量级。最后，我们表明探测器中缺乏光子数分辨率对测量精度仅产生适度的不利影响，并使用探测器阵列使用新方法和传统方法模拟成像，表明新方法提高了图像清晰度和对比度。
We implement a general imaging method by measuring the complex degree of coherence using linear optics and photon number resolving detectors. In the absence of collective or entanglement-assisted measurements, our method is optimal over a large range of practically relevant values of the complex degree of coherence. We measure the size and position of a small distant source of pseudothermal light, and show that our method outperforms the traditional imaging method by an order of magnitude in precision. Finally, we show that a lack of photon-number resolution in the detectors has only a modest detrimental effect on measurement precision and simulate imaging using the new and traditional methods with an array of detectors, showing that the new method improves both image clarity and contrast.