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arXiv 1910.03323quant-ph
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大光子数多模Fock态的有效描述及其在量子精密测量中的应用

Multimode Fock states with large photon number: effective descriptions and applications in quantum metrology

M. Perarnau-Llobet, A. González-Tudela, J. I. Cirac

摘要:

我们开发了通用的工具来计算和有效地计算多模$N$ -光子态在一维波导中的非线性衰减产生的相关可观测量。然后,我们考虑在马赫-曾德尔干涉仪中的光学干涉,其中$d$模式的光子态进入干涉仪的每个臂。我们推导出一个简单的表达式的量子费舍尔信息在每个模式的平均光子数,并表明,它可以饱和的数目分辨光子测量,不区分不同的$d$模式。

英文摘要:

We develop general tools to characterise and efficiently compute relevant observables of multimode $N$-photon states generated in non-linear decays in one-dimensional waveguides. We then consider optical interferometry in a Mach-Zender interferometer where a $d$-mode photonic state enters in each arm of the interferometer. We derive a simple expression for the Quantum Fisher Information in terms of the average photon number in each mode, and show that it can be saturated by number-resolved photon measurements that do not distinguish between the different $d$ modes.

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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