Quantum metrology with a non-Markovian qubit system

doi:10.1088/1674-1056/27/12/120301

中国物理B ›› 2018, Vol. 27 ›› Issue (12): 120301-120301.doi: 10.1088/1674-1056/27/12/120301

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇下一篇

Quantum metrology with a non-Markovian qubit system

Jiang Huang(黄江), Wen-Qing Shi(师文庆), Yu-Ping Xie(谢玉萍), Guo-Bao Xu(徐国保), Hui-Xian Wu(巫慧娴)

College of Electronics and Information Engineering, Guangdong Ocean University, Zhanjiang 524088, China

收稿日期:2018-08-02 修回日期:2018-09-01 出版日期:2018-12-05 发布日期:2018-12-05
通讯作者: Wen-Qing Shi, Guo-Bao Xu E-mail:swqafj@163.com;xuguobao@126.com
基金资助:
Projects supported by the Natural Science Foundation of Guangdong Province, China (Grant No. 2015A030310354), the Science Foundation for Enhancing School with Innovation of Guangdong Ocean University (Grant Nos. GDOU2017052504 and GDOU2015050207), the Foundation of Excellent-Young-Backbone Teacher of Guangdong Ocean University (Grant No. HDYQ2017005), and the Fund of University Student Innovation and Entrepreneurship Team of Guangdong Ocean University (Grant No. CCTD201823).

Quantum metrology with a non-Markovian qubit system

Jiang Huang(黄江), Wen-Qing Shi(师文庆), Yu-Ping Xie(谢玉萍), Guo-Bao Xu(徐国保), Hui-Xian Wu(巫慧娴)

College of Electronics and Information Engineering, Guangdong Ocean University, Zhanjiang 524088, China

Received:2018-08-02 Revised:2018-09-01 Online:2018-12-05 Published:2018-12-05
Contact: Wen-Qing Shi, Guo-Bao Xu E-mail:swqafj@163.com;xuguobao@126.com
Supported by:
Projects supported by the Natural Science Foundation of Guangdong Province, China (Grant No. 2015A030310354), the Science Foundation for Enhancing School with Innovation of Guangdong Ocean University (Grant Nos. GDOU2017052504 and GDOU2015050207), the Foundation of Excellent-Young-Backbone Teacher of Guangdong Ocean University (Grant No. HDYQ2017005), and the Fund of University Student Innovation and Entrepreneurship Team of Guangdong Ocean University (Grant No. CCTD201823).

摘要/Abstract

摘要：

The dynamics of the quantum Fisher information (QFI) of phase parameter estimation in a non-Markovian dissipative qubit system is investigated within the structure of single and double Lorentzian spectra. We use the time-convolutionless method with fourth-order perturbation expansion to obtain the general forms of QFI for the qubit system in terms of a non-Markovian master equation. We find that the phase parameter estimation can be enhanced in our model within both single and double Lorentzian spectra. What is more, the detuning and spectral width are two significant factors affecting the enhancement of parameter-estimation precision.

关键词: quantum metrology, quantum Fisher information, time-convolutionless, parameter estimation

Abstract:

Key words: quantum metrology, quantum Fisher information, time-convolutionless, 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, 师文庆, 谢玉萍, 徐国保, 巫慧娴. Quantum metrology with a non-Markovian qubit system[J]. 中国物理B, 2018, 27(12): 120301-120301.

Jiang Huang(黄江), Wen-Qing Shi(师文庆), Yu-Ping Xie(谢玉萍), Guo-Bao Xu(徐国保), Hui-Xian Wu(巫慧娴). Quantum metrology with a non-Markovian qubit system[J]. Chin. Phys. B, 2018, 27(12): 120301-120301.

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Quantum metrology with a non-Markovian qubit system

Quantum metrology with a non-Markovian qubit system

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