论文标题
通过纠缠的多体探针估算未造成效果
Estimating the Unruh effect via entangled many-body probes
论文作者
论文摘要
我们研究了基于纠缠多体unruh-dewitt检测器的量子计量方案中参数的估计。发现可以通过初始状态制剂和参数选择来增强估计UNRUH效果的精度。结果表明，根据多种探针计量学的估计，对UNRUH温度的估计的精度总是比两种探针策略的精度更好。 BOB检测器的适当加速度以及加速检测器与外部场之间的相互作用对INRUH效应估计的精度有重大影响。此外，发现在初始状态下使用更多激发原子制备的探针状态比初始状态不太激发的态度更好。然而，与对未成年温度的估计不同，加速检测器的有效耦合参数的估计需要更多的总原子，但估计值中的原子较少。
We study the estimation of parameters in a quantum metrology scheme based on entangled many-body Unruh-DeWitt detectors. It is found that the precision for the estimation of Unruh effect can be enhanced via initial state preparations and parameter selections. It is shown that the precision in the estimation of the Unruh temperature in terms of a many-body-probe metrology is always better than the precision in two probe strategies. The proper acceleration for Bob's detector and the interaction between the accelerated detector and the external field have significant influences on the precision for the Unruh effect's estimation. In addition, the probe state prepared with more excited atoms in the initial state is found to perform better than less excited initial states. However, different from the estimation of the Unruh temperature, the estimation of the effective coupling parameter for the accelerated detector requires more total atoms but less excited atoms in the estimations.
