论文标题
实现最终的量子计时分辨率
Achieving the ultimate quantum timing resolution
论文作者
论文摘要
准确的时间延迟测量是许多现代技术的核心。在这里，我们提出了一种时间模式反复运动方案，该方案可以同时估算时间质心，时间偏移以及单光子水平上超固定脉冲的不连贯混合物的相对强度，从而达到了最终的量子精度。我们通过实验来解决时间分离的时间比脉搏持续时间小十倍，并且强度不平衡的差异为$ 10^{2} $。这代表了基于强度检测的最佳标准方法的改进不仅仅是一个数量级。
Accurate time-delay measurement is at the core of many modern technologies. Here, we present a temporal-mode demultiplexing scheme that achieves the ultimate quantum precision for the simultaneous estimation of the temporal centroid, the time offset, and the relative intensities of an incoherent mixture of ultrashort pulses at the single-photon level. We experimentally resolve temporal separations ten times smaller than the pulse duration, as well as imbalanced intensities differing by a factor of $10^{2}$. This represents an improvement of more than an order of magnitude over the best standard methods based on intensity detection.
