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北美退伍军人节(Veterans Day),12 日无更新
arXiv 2008.03161quant-ph
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光相位估计中的压缩效应

Squeezing as a resource to counteract phase diffusion in optical phase estimation

Giacomo Carrara, Marco G. Genoni, Simone Cialdi, Matteo G. A. Paris, Stefano Olivares

摘要:

我们解决了一个相位估计方案,使用高斯状态的存在下,非高斯相位噪声。与以前的分析不同,我们分析了在编码相位信息之前发生噪声的情况。特别是,我们研究如何挤压可能是有益的相位扩散之前或之后使用。我们的研究结果表明,压缩后的噪声的探针大大提高了估计方案的灵敏度,证明了量子费舍尔信息的增加。然后,我们考虑一个现实的设置,零差检测采用在测量阶段,并解决其最优性,以及在两个不同的情况下,其性能。

英文摘要:

We address a phase estimation scheme using Gaussian states in the presence of non-Gaussian phase noise. At variance with previous analysis, we analyze situations in which the noise occurs before encoding phase information. In particular, we study how squeezing may be profitably used before or after phase diffusion. Our results show that squeezing the probe after the noise greatly enhances the sensitivity of the estimation scheme, as witnessed by the increase of the quantum Fisher information. We then consider a realistic setup where homodyne detection is employed at the measurement stage, and address its optimality as well as its performance in the two different scenarios.

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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