Adaptive homodyne measurement of optical phase

被引：247

作者：

Armen, MA ^{[1
]}

Au, JK ^{[1
]}

Stockton, JK ^{[1
]}

Doherty, AC ^{[1
]}

Mabuchi, H ^{[1
]}

机构：

[1] CALTECH, Norman Bridge Lab Phys 12 33, Pasadena, CA 91125 USA

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 13期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.89.133602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present an experimental demonstration of the power of feedback in quantum metrology, confirming the predicted [H. M. Wiseman, Phys. Rev. Lett. 75, 4587 (1995)] superior performance of an adaptive homodyne technique for single-shot measurement of optical phase. For measurements performed on weak coherent states with no prior knowledge of the signal phase, adaptive homodyne estimation approaches closer to the intrinsic quantum uncertainty than any previous technique. Our results underscore the importance of real-time feedback for reaching quantum limits in measurement and control.

引用

页数：4

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