论文标题
两级原子的加速度的估计精度与波动的真空电磁场耦合
Estimation precision of the acceleration for a two-level atom coupled to fluctuating vacuum electromagnetic fields
论文作者
论文摘要
在开放的量子系统中，我们研究了一个均匀加速的两级原子的量子渔民，并在Minkowski真空中耦合到波动的电磁场。随着时间的发展，对于初始原子态参数$θ\neqπ$，量子渔民信息可以存在最大值和局部最小值，然后才能达到稳定值。此外，在短时间内，量子渔民信息随初始状态参数而变化，量子渔民信息可以在$θ= 0 $时获得最大值。量子Fisher信息可能在一定时刻存在两个峰值。这些功能与无质量标量场的情况不同。随着时间的发展，$ f_ {max} $首先增加，然后减小，最后达到相同的值。但是，$ f_ {max} $对于无质量标量字段的情况将达到稳定的最大值。尽管原子对真空波动电磁场的反应与无质量标量场不同，但量子渔民信息最终达到了稳定的值。
In open quantum systems, we study the quantum Fisher information of acceleration for a uniformly accelerated two-level atom coupled to fluctuating electromagnetic fields in the Minkowski vacuum. With the time evolution, for the initial atom state parameter $θ\neqπ$, the quantum Fisher information can exist a maximum value and a local minimum value before reaching a stable value. In addition, in a short time, the quantum Fisher information varies with the initial state parameter, and the quantum Fisher information can take a maximum value at $θ=0$. The quantum Fisher information may exist two peak values at a certain moment. These features are different from the massless scalar fields case. With the time evolution, $F_{max}$ firstly increases, then decreases, and finally, reaches the same value. However, $F_{max}$ will arrive at a stable maximum value for the case of the massless scalar fields. Although the atom response to the vacuum fluctuation electromagnetic fields is different from the case of massless scalar fields, the quantum Fisher information eventually reaches a stable value.
