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arXiv quant-ph/0511059quant-phcond-mat.stat-mech
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马赫-曾德尔干涉仪的相位灵敏度

Phase Sensitivity of a Mach-Zehnder Interferometer

Luca Pezze', Augusto Smerzi

摘要:

马赫-曾德尔干涉仪的最佳性能是在输入态|N_T/2 + 1>| N_T/2-1 > +| N_T/2 - 1>| N_T/2+1>,N_T是原子/光子的总数。这给出:i)相移误差置信度C_{68%} =2.67/N_T,ii)单个干涉测量。不同的输入量子态可以达到~ 1/N_T的海森堡标度,但需要更高的前因子,并且需要对两个或多个独立的测量进行统计分析。

英文摘要:

The best performance of a Mach-Zehnder interferometer is achieved with the input state |N_T/2 + 1>|N_T/2-1 > + |N_T/2 - 1>|N_T/2+1>, being N_T the total number of atoms/photons. This gives: i) a phase-shift error confidence C_{68%}=2.67/N_T with ii) a single interferometric measurement. Different input quantum states can achieve the Heisenberg scaling ~ 1/N_T but with higher prefactors and at the price of a statistical analysis of two or more independent measurements.

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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