The effects of different quantum feedback operator types on the parameter precision of detection efficiency in optimal quantum estimation

Shao Qiang Ma; Han Jie Zhu; Guo Feng Zhang

doi:10.1016/j.physleta.2017.02.027

The effects of different quantum feedback operator types on the parameter precision of detection efficiency in optimal quantum estimation

Shao Qiang Ma
, Han Jie Zhu
, Guo Feng Zhang^*

^*Corresponding author for this work

School of Physics

School of Physics and Nuclear Energy Engineering
Beihang University
Tsinghua University
University of Science and Technology of China

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

The effects of different quantum feedback types on the estimation precision of the detection efficiency are studied. It is found that the precision can be more effective enhanced by a certain feedback type through comparing these feedbacks and the precision has a positive relation with detection efficiency for the optimal feedback when the system reach the state of dynamic balance. In addition, the bigger the proportion of |1〉 is the higher the precision is and we will not obtain any information about the parameter to be estimated if |0〉 is chosen as initial state for the feedback type λσ_z.

Original language	English
Pages (from-to)	1386-1392
Number of pages	7
Journal	Physics Letters, Section A: General, Atomic and Solid State Physics
Volume	381
Issue number	16
DOIs	https://doi.org/10.1016/j.physleta.2017.02.027
State	Published - 25 Apr 2017

Keywords

Efficiency of the detection
Feedback
Precision of parameter estimation
Quantum Fisher information (QFI)

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10.1016/j.physleta.2017.02.027

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title = "The effects of different quantum feedback operator types on the parameter precision of detection efficiency in optimal quantum estimation",

abstract = "The effects of different quantum feedback types on the estimation precision of the detection efficiency are studied. It is found that the precision can be more effective enhanced by a certain feedback type through comparing these feedbacks and the precision has a positive relation with detection efficiency for the optimal feedback when the system reach the state of dynamic balance. In addition, the bigger the proportion of |1〉 is the higher the precision is and we will not obtain any information about the parameter to be estimated if |0〉 is chosen as initial state for the feedback type λσz.",

keywords = "Efficiency of the detection, Feedback, Precision of parameter estimation, Quantum Fisher information (QFI)",

author = "Ma, \{Shao Qiang\} and Zhu, \{Han Jie\} and Zhang, \{Guo Feng\}",

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year = "2017",

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doi = "10.1016/j.physleta.2017.02.027",

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The effects of different quantum feedback operator types on the parameter precision of detection efficiency in optimal quantum estimation. / Ma, Shao Qiang; Zhu, Han Jie; Zhang, Guo Feng.
In: Physics Letters, Section A: General, Atomic and Solid State Physics, Vol. 381, No. 16, 25.04.2017, p. 1386-1392.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - The effects of different quantum feedback operator types on the parameter precision of detection efficiency in optimal quantum estimation

AU - Ma, Shao Qiang

AU - Zhu, Han Jie

AU - Zhang, Guo Feng

PY - 2017/4/25

Y1 - 2017/4/25

N2 - The effects of different quantum feedback types on the estimation precision of the detection efficiency are studied. It is found that the precision can be more effective enhanced by a certain feedback type through comparing these feedbacks and the precision has a positive relation with detection efficiency for the optimal feedback when the system reach the state of dynamic balance. In addition, the bigger the proportion of |1〉 is the higher the precision is and we will not obtain any information about the parameter to be estimated if |0〉 is chosen as initial state for the feedback type λσz.

AB - The effects of different quantum feedback types on the estimation precision of the detection efficiency are studied. It is found that the precision can be more effective enhanced by a certain feedback type through comparing these feedbacks and the precision has a positive relation with detection efficiency for the optimal feedback when the system reach the state of dynamic balance. In addition, the bigger the proportion of |1〉 is the higher the precision is and we will not obtain any information about the parameter to be estimated if |0〉 is chosen as initial state for the feedback type λσz.

KW - Efficiency of the detection

KW - Feedback

KW - Precision of parameter estimation

KW - Quantum Fisher information (QFI)

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M3 - 文章

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SN - 0375-9601

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JO - Physics Letters, Section A: General, Atomic and Solid State Physics

JF - Physics Letters, Section A: General, Atomic and Solid State Physics

IS - 16

ER -

The effects of different quantum feedback operator types on the parameter precision of detection efficiency in optimal quantum estimation

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Keywords

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