Enhancing parameter precision of optimal quantum estimation by quantum screening

doi:10.1088/1674-1056/25/2/020303

中国物理B ›› 2016, Vol. 25 ›› Issue (2): 20303-020303.doi: 10.1088/1674-1056/25/2/020303

Enhancing parameter precision of optimal quantum estimation by quantum screening

Huang Jiang(黄江), Guo You Neng(郭有能), Xie Qin(谢钦)

1. Physical and Photoelectric Science Department, Guangdong Ocean University, Zhanjiang 524088, China;
2. Department of Electronic and Communication Engineering, Changsha University, Changsha 410003, China

收稿日期:2015-08-08 修回日期:2015-10-11 出版日期:2016-02-05 发布日期:2016-02-05
通讯作者: Guo You Neng E-mail:guoxuyan2007@163.com
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11374096), the Natural Science Foundation of Guangdong Province, China (Grants No. 2015A030310354), and the Project of Enhancing School with Innovation of Guangdong Ocean University (Grants Nos. GDOU2014050251 and GDOU2014050252).

Enhancing parameter precision of optimal quantum estimation by quantum screening

Huang Jiang(黄江)¹, Guo You Neng(郭有能)², Xie Qin(谢钦)¹

1. Physical and Photoelectric Science Department, Guangdong Ocean University, Zhanjiang 524088, China;
2. Department of Electronic and Communication Engineering, Changsha University, Changsha 410003, China

Received:2015-08-08 Revised:2015-10-11 Online:2016-02-05 Published:2016-02-05
Contact: Guo You Neng E-mail:guoxuyan2007@163.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11374096), the Natural Science Foundation of Guangdong Province, China (Grants No. 2015A030310354), and the Project of Enhancing School with Innovation of Guangdong Ocean University (Grants Nos. GDOU2014050251 and GDOU2014050252).

摘要/Abstract

摘要： We propose a scheme of quantum screening to enhance the parameter-estimation precision in open quantum systems by means of the dynamics of quantum Fisher information. The principle of quantum screening is based on an auxiliary system to inhibit the decoherence processes and erase the excited state to the ground state. By comparing the case without quantum screening, the results show that the dynamics of quantum Fisher information with quantum screening has a larger value during the evolution processes.

关键词: quantum Fisher information, quantum screening, parameter estimation

Abstract: We propose a scheme of quantum screening to enhance the parameter-estimation precision in open quantum systems by means of the dynamics of quantum Fisher information. The principle of quantum screening is based on an auxiliary system to inhibit the decoherence processes and erase the excited state to the ground state. By comparing the case without quantum screening, the results show that the dynamics of quantum Fisher information with quantum screening has a larger value during the evolution processes.

Key words: quantum Fisher information, quantum screening, parameter estimation

中图分类号: (Decoherence; open systems; quantum statistical methods)

03.65.Yz

03.65.Ud (Entanglement and quantum nonlocality) 03.67.Mn (Entanglement measures, witnesses, and other characterizations)

黄江, 郭有能, 谢钦. Enhancing parameter precision of optimal quantum estimation by quantum screening[J]. 中国物理B, 2016, 25(2): 20303-020303.

Huang Jiang(黄江), Guo You Neng(郭有能), Xie Qin(谢钦). Enhancing parameter precision of optimal quantum estimation by quantum screening[J]. Chin. Phys. B, 2016, 25(2): 20303-020303.

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Enhancing parameter precision of optimal quantum estimation by quantum screening

Enhancing parameter precision of optimal quantum estimation by quantum screening

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