论文标题
通过Hilbert-Schmidt速度监测折射率的变化，并应用此现象以改善量子计量学
Monitoring variations of refractive index via Hilbert-Schmidt speed and applying this phenomenon to improve quantum metrology
论文作者
论文摘要
有效的非线性光学相互作用对于现代光子学中的许多应用至关重要。在本文中，我们研究了材料非线性响应在改善量子计量学方面的作用。特别是，将原子集合的集体光学行为应用于通过其中一个原子来增强频率估计。此外，我们引入了易于计算的理论工具Hilbert-Schmidt速度，以监视线性和非线性折射率的变化，并评估光学材料非线性响应的强度。此外，我们说明了量子Fisher信息和Hilbert-Schmidt速度可以有效地检测出负介电常数和折射率，从实际的角度来看，这非常重要。
Effective nonlinear optical interactions are essential for many applications in modern photonics. In this paper, we investigate the role of the nonlinear response of a material to improve quantum metrology. In particular, the collective optical behavior of an atomic ensemble is applied to enhance frequency estimation through one of the atoms. Moreover, we introduce Hilbert-Schmidt speed, an easily computable theoretical tool, to monitor the variations of linear as well as nonlinear refractive indices and evaluate the strength of the nonlinear response of optical materials. Furthermore, we illustrate that quantum Fisher information and Hilbert-Schmidt speed can efficiently detect negative permittivity and refractive index, which is of great importance from a practical point of view.
