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Enhancing estimation precision of parameter for a two-level atom with circular motion

  • Ying Yang
  • Jiliang JingEmail author
  • Zixu Zhao
Article
  • 76 Downloads

Abstract

We find a way to improve the estimation precision of parameter by enhancing the quantum Fisher information (QFI) of parameter by investigating the dynamics of a two-level atom with circular motion which is coupled to the scalar field in open quantum system. Our results illustrate that the QFI of phase decreases with the increase in centripetal acceleration and the evolution of time. However, in contrast to the unbounded case, we find that the QFI of phase decreases slowly with a boundary. Especially, the QFI tends to 1 when the atom is very close to the boundary, which implies that the atom is shielded from the influence of the vacuum fluctuation with a boundary. Therefore, we can enhance the estimation precision of the parameter by choosing an appropriate position.

Keywords

Precision of parameter estimation Quantum Fisher information Quantum metrology Boundary 

Notes

Acknowledgements

This work was supported by the National Natural Science Foundation of China under Grant Nos. 11875025 and 11705144, and the Scientific Research Program of Education Department of Shaanxi Provincial Government (17JK0706).

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Authors and Affiliations

  1. 1.Department of Physics, Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Synergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal UniversityChangshaPeople’s Republic of China
  2. 2.School of ScienceXi’an University of Posts and TelecommunicationsXi’anPeople’s Republic of China

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