Effects of partial-collapse measurement on the parameter-estimation precision of noisy quantum channels

被引：6
|
作者：
Liao, Xiang-Ping [1 ]
Fang, Mao-Fa [2 ]
Zhou, Xin [1 ]
机构：
[1] Hunan Univ Technol, Coll Sci, Zhuzhou 412008, Hunan, Peoples R China
[2] Hunan Normal Univ, Coll Phys & Informat Sci, Changsha 410081, Hunan, Peoples R China
来源：
QUANTUM INFORMATION PROCESSING | 2017年 / 16卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Parameter-estimation precision; Quantum Fisher information; Noisy quantum channel; Partial-collapse measurement; ENTANGLEMENT; COMPUTATION; DISTANCE; QUBIT;
D O I：
10.1007/s11128-017-1696-6
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
An efficient method is proposed to enhance the parameter-estimation precision for noisy quantum channels based on measurement reversal from partial-collapse measurement. It is shown that the quantum Fisher information can be distinctly improved for amplitude-damping channel, phase-damping channel and depolarizing channel with partial-collapse measurement. This also means that choosing the appropriate measurement strengths can lead to higher precision of estimation on noisy quantum channels.
引用
收藏
页数：13
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