论文标题
最佳传输估计与黑暗计数
Optimal transmission estimation with dark counts
论文作者
论文摘要
从光纤到光谱法至关重要的传输测量是必不可少的。量子理论表明，使用具有确定的光子数和光子数分辨率检测器（PNRDS）的探针状态实现估计传输或损失的最终精度。当探测器因黑暗计数和其他虚假事件引起的探测器射击时，相对于经典探针光的量子优势仍然可以保持吗？我们证明了这个问题的答案是肯定的，并详细说明了量子优势如何取决于黑暗计数，并随着福克状态探针的强度而增加。这些结果尤其相关，因为PNRD的当前功能正在显着提高。
Transmission measurements are essential from fiber optics to spectroscopy. Quantum theory dictates that the ultimate precision in estimating transmission or loss is achieved using probe states with definite photon number and photon-number-resolving detectors (PNRDs). Can the quantum advantage relative to classical probe light still be maintained when the detectors fire due to dark counts and other spurious events? We demonstrate that the answer to this question is affirmative and show in detail how the quantum advantage depends on dark counts and increases with Fock-state-probe strength. These results are especially pertinent as the present capabilities of PNRDs are being dramatically improved.
