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Erschienen in: Quantum Information Processing 4/2019

01.04.2019

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

verfasst von: Ying Yang, Jiliang Jing, Zixu Zhao

Erschienen in: Quantum Information Processing | Ausgabe 4/2019

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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.

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Metadaten
Titel
Enhancing estimation precision of parameter for a two-level atom with circular motion
verfasst von
Ying Yang
Jiliang Jing
Zixu Zhao
Publikationsdatum
01.04.2019
Verlag
Springer US
Erschienen in
Quantum Information Processing / Ausgabe 4/2019
Print ISSN: 1570-0755
Elektronische ISSN: 1573-1332
DOI
https://doi.org/10.1007/s11128-019-2235-4

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