Phase Sensitivity of a Mach-Zehnder Interferometer
量子物理
2009-11-11 v1 统计力学
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.
关键词
引用
@article{arxiv.quant-ph/0511059,
title = {Phase Sensitivity of a Mach-Zehnder Interferometer},
author = {Luca Pezze' and Augusto Smerzi},
journal= {arXiv preprint arXiv:quant-ph/0511059},
year = {2009}
}
备注
4 figures