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arXiv 1811.02412quant-phphysics.optics
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马赫-曾德尔干涉仪单强度和差强度检测的相位灵敏度

Phase sensitivity of a Mach-Zehnder interferometer with single-intensity and difference-intensity detection

Stefan Ataman, Anca Preda, Radu Ionicioiu

摘要:

干涉测量是在经典和量子背景下广泛使用的精密测量技术。提高相位测量精度的一种方法,例如在马赫-曾德尔干涉仪(MZI)中,是使用高强度激光。在本文中,我们研究的相位灵敏度的MZI在两个检测设置(差强度检测和单模强度检测)和三个输入方案(相干,双相干和相干加压缩真空)。对于相干和双相干输入,这两种检测设置都可以达到量子克拉美-罗界,尽管在不同的最佳相移值。双相干输入方案具有通过改变输入功率比来改变最佳相移的独特优点。

英文摘要:

Interferometry is a widely-used technique for precision measurements in both classical and quantum contexts. One way to increase the precision of phase measurements, for example in a Mach-Zehnder interferometer (MZI), is to use high-intensity lasers. In this paper we study the phase sensitivity of a MZI in two detection setups (difference intensity detection and single-mode intensity detection) and for three input scenarios (coherent, double coherent and coherent plus squeezed vacuum). For the coherent and double coherent input, both detection setups can reach the quantum Cramer-Rao bound, although at different values of the optimal phase shift. The double coherent input scenario has the unique advantage of changing the optimal phase shift by varying the input power ratio.

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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