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arXiv 2006.08438quant-ph
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用于亚散粒噪声吸收测量的双束实验的实用模型

A practical model of twin-beam experiments for sub-shot-noise absorption measurements

Jason D. Mueller, Nigam Samantaray, Jonathan C. F. Matthews

摘要:

量子强度相关的双光束可以用来测量吸收,其精度超过经典的散粒噪声限制。这可以用给定的估计器实现的程度由双光束强度相关性的质量定义,其由噪声降低因子量化。我们推导出一个双光束实验的分析模型,将实验参数,如相对检测效率的光束,不相关的光学噪声,和不相关的检测器噪声。我们发现,对于没有过多的噪声的双光束,测量的相关性可以通过提高每个光束的检测效率来改善,尽管这可能会不平衡的检测效率。然而,对于具有过量强度或其他实验噪声的光束,应该平衡检测效率,即使以降低检测效率为代价-我们具体定义了这些噪声条件,并通过统计模拟验证了我们的结果。这在吸收光谱和成像实验的设计和优化中具有应用。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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