发表机构
Palacký University(帕拉茨基大学)
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
提出一种利用多路复用探测器点击统计直接估计二阶相关函数 $g^{(2)}(0)$ 的方法,适用于多种量子光态,并推导非经典性判据,为量子光表征提供简单通用工具。
AI 中文摘要
我们提出并理论分析了一种直接从由M个二进制开-关探测通道组成的多路复用探测器的点击统计中估计二阶相关函数 $g^{(2)}(0)$ 的方法。该方法使用光子数算符第一和第二矩的线性估计器,即使对于平均光子数较大的光场也能提供准确结果。对于固定数量的通道,通过在探测器前引入额外损耗可以扩展探测范围。我们展示了该方法对相干态、热态、振幅压缩态和光子增加相干态的性能。我们还基于估计的相关函数推导了一个非经典性判据,并展示了该方法如何适应不平衡探测器。我们的工作确立了直接从多路复用点击探测器定量表征量子光的 $g^{(2)}(0)$ 估计作为一种简单且通用的方法。
英文摘要
We present and theoretically analyze a method for direct estimation of the second-order correlation function $g^{(2)}(0)$ from the click statistics of a multiplexed detector composed of M binary on-off detection channels. The method uses linear estimators of the first and second moments of the photon-number operator and can provide accurate results even for optical fields with substantial mean photon numbers. For a fixed number of channels, the detection range can be extended by introducing additional losses before the detector. We demonstrate the performance of the method for coherent, thermal, amplitude-squeezed, and photon-added coherent states. We also derive a nonclassicality criterion based on the estimated correlation function and show how the method can be adapted to unbalanced detectors. Our work establishes direct estimation of $g^{(2)}(0)$ as a simple and versatile method for quantitatively characterizing quantum light using multiplexed click detectors.
Comments10 pages, 9 figures REVTeX4