论文标题
双束梁实验的实用模型，用于子射击吸收测量
A practical model of twin-beam experiments for sub-shot-noise absorption measurements
论文作者
论文摘要
量子强度相关的光束可用于测量超过经典射击限制的精度。通过给定估计器可以实现这一目标的程度是由双光束强度相关性的质量定义的，该相关性通过减少降噪系数进行了量化。我们得出了双梁实验的分析模型，并结合了实验参数，例如梁的相对检测效率，不相关的光学噪声和不相关的检测器噪声。我们表明，对于没有过多噪声的双光束，尽管这可能不平衡检测效率，但可以通过提高每个光束的检测效率来提高测得的相关性。但是，对于具有过度强度或其他实验噪声的光束，即使以降低检测效率为代价，也应平衡检测效率 - 我们专门定义了这些噪声条件并通过统计模拟来验证我们的结果。这在吸收光谱和成像实验的设计和优化中具有应用。
Quantum-intensity-correlated twin beams of light can be used to measure absorption with precision beyond the classical shot-noise limit. The degree to which this can be achieved with a given estimator is defined by the quality of the twin-beam intensity correlations, which is quantified by the noise reduction factor. We derive an analytical model of twin-beam experiments, incorporating experimental parameters such as the relative detection efficiency of the beams, uncorrelated optical noise, and uncorrelated detector noise. We show that for twin beams without excessive noise, measured correlations can be improved by increasing the detection efficiency of each beam, notwithstanding this may unbalance detection efficiency. However, for beams with excess intensity or other experimental noise, one should balance detection efficiency, even at the cost of reducing detection efficiency -- we specifically define these noise conditions and verify our results with statistical simulation. This has application in design and optimization of absorption spectroscopy and imaging experiments.
