Using states with a large photon number variance to increase quantum Fisher information in single-mode phase estimation

被引：9

作者：

Lee, Changhyoup ^{[1
]}

Oh, Changhun ^{[2
]}

Jeong, Hyunseok ^{[2
]}

Rockstuhl, Carsten ^{[1
,3
]}

Lee, Su-Yong ^{[4
]}

机构：

[1] Karlsruhe Inst Technol, Inst Theoret Solid State Phys, D-76131 Karlsruhe, Germany

[2] Seoul Natl Univ, Ctr Macroscop Quantum Control, Dept Phys & Astron, Seoul 08826, South Korea

[3] Karlsruhe Inst Technol, Inst Nanotechnol, D-76021 Karlsruhe, Germany

[4] Agcy Def Dev, Quantum Phys Technol Directorate, Daejeon, South Korea

来源：

JOURNAL OF PHYSICS COMMUNICATIONS | 2019年 / 3卷 / 11期

基金：

新加坡国家研究基金会;

关键词：

quantum metrology; quantum Fisher information; phase estimation; LIKELIHOOD; LIMITS;

D O I：

10.1088/2399-6528/ab524a

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

When estimating the phase of a single mode, the quantum Fisher information for a pure probe state is proportional to the photon number variance of the probe state. In this work, we point out particular states that offer photon number distributions exhibiting a large variance, which would help to improve the local estimation precision. These theoretical examples are expected to stimulate the community to put more attention to those states that we found, and to work towards their experimental realization and usage in quantum metrology.

引用

页数：8

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