Sensitivity Bounds for Multiparameter Quantum Metrology

被引：118

作者：

Gessner, Manuel ^{[1
]}

Pezze, Luca

Smerzi, Augusto

机构：

[1] CNR INO, QSTAR, Largo Enrico Fermi 2, I-50125 Florence, Italy

来源：

PHYSICAL REVIEW LETTERS | 2018年 / 121卷 / 13期

关键词：

STATES; CLOCKS; LIGHT;

D O I：

10.1103/PhysRevLett.121.130503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We identify precision limits for the simultaneous estimation of multiple parameters in multimode interferometers. Quantum strategies to enhance the multiparameter sensitivity are based on entanglement among particles, modes, or combining both. The maximum attainable sensitivity of particle-separable states defines the multiparameter shot-noise limit, which can be surpassed without mode entanglement. Further enhancements up to the multiparameter Heisenberg limit are possible by adding mode entanglement. Optimal strategies that saturate the precision bounds are provided.

引用

页数：7

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