Quantum-Limited Mirror-Motion Estimation

被引：52

作者：

Iwasawa, Kohjiro ^{[1
]}

Makino, Kenzo ^{[1
]}

Yonezawa, Hidehiro ^{[1
]}

Tsang, Mankei ^{[2
,3
]}

Davidovic, Aleksandar ^{[4
]}

Huntington, Elanor ^{[4
,5
]}

Furusawa, Akira ^{[1
]}

机构：

[1] Univ Tokyo, Sch Engn, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan

[2] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117583, Singapore

[3] Natl Univ Singapore, Dept Phys, Singapore 117551, Singapore

[4] Univ New S Wales, Sch Engn & Informat Technol, Canberra, ACT 2600, Australia

[5] Australian Res Council, Ctr Quantum Computat & Commun Technol, Canberra, ACT 2601, Australia

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 16期

基金：

澳大利亚研究理事会; 新加坡国家研究基金会;

关键词：

OPTOMECHANICS;

D O I：

10.1103/PhysRevLett.111.163602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We experimentally demonstrate optomechanical motion and force measurements near the quantum precision limits set by the quantum Cramer-Rao bounds. Optical beams in coherent and phase-squeezed states are used to measure the motion of a mirror under an external stochastic force. Utilizing optical phase tracking and quantum smoothing techniques, we achieve position, momentum, and force estimation accuracies close to the quantum Cramer-Rao bounds with the coherent state, while the estimation using squeezed states shows clear quantum enhancements beyond the coherent-state bounds.

引用

页数：5

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