Abstract

We 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

中文翻译：

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受边界波动的真空电磁场影响的量子Fisher信息

摘要

我们研究在完全反射边界附近与波动电磁真空相互作用的加速原子的量子Fisher信息（QFI）的行为。首先推导控制原子演化的主方程。在无边界的情况下，电磁真空的波动和加速总是使QFI衰减。然而，在存在边界的情况下，QFI的退化，振荡和维持取决于原子的边界距离，原子的加速和极化方向。在某些条件下，该边界可以有效地使QFI免受波动的电磁真空和加速度的影响，并让我们有更大的自由来操纵参数估计的精度。

图形概要