Quantum Fisher information affected by fluctuating vacuum electromagnetic field with a boundary

Quantum Fisher information affected by fluctuating vacuum electromagnetic field with a boundary
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受边界波动真空电磁场影响的量子费希尔信息

DOI:
10.1140/epjd/e2020-10149-9
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发表时间:
2020-06
影响因子:
1.8
通讯作者:
He Zhimin
He Zhimin
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Huang Zhiming;He Zhimin

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研究了在理想反射边界附近,加速原子与起伏电磁真空相互作用系统的量子Fisher信息(QFI)行为。首先导出了控制原子演化的主方程。在无边界情况下,电磁真空的涨落和加速总是衰减QFI。然而,当存在边界时,QFI的退化、振荡和维持依赖于原子与边界的距离、加速度和原子的极化方向。该边界在一定条件下可以有效地屏蔽QFI受电磁真空和加速度波动的影响,使我们在参数估计的精度上有更大的自由度。图形摘要
AbstractWe study the behaviors of quantum Fisher information (QFI) for an accelerated atom interacted with fluctuating electromagnetic vacuum near a perfectly reflecting boundary. The master equation that governs the atom evolution is firstly derived. In the case without boundary, the fluctuation and acceleration of electromagnetic vacuum always attenuate the QFI. Nevertheless, in the presence of a boundary, the degradation, oscillation, and maintaining of QFI are dependent on the atom-boundary distance, acceleration and polarization direction of atom. The boundary can efficiently shield QFI from the impact of the fluctuating electromagnetic vacuum and acceleration in some certain conditions and let us have more freedom of manipulating the precision of parameter estimation.Graphical abstract
DOI: 10.1007/978-3-319-97798-0
发表时间: 2012-10
期刊: 2012 9th European Radar Conference
影响因子: --
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