论文标题
Fisher信息分析有关单个光子的电磁诱导 - 透明谱中量子增强参数估计的分析
Fisher information analysis on quantum-enhanced parameter estimation in electromagnetically-induced-transparency spectrum with single photons
论文作者
论文摘要
电磁诱导的透明度（EIT）光谱已被用作量子计量应用中的敏感传感器。传感器的灵敏度在很大程度上取决于EIT光谱的测量精度。在这项工作中，我们基于Fisher Information（FI）分析，介绍了三级$λ$ -IT型媒体的光谱线形测量的理论研究。使用两种探测来源：单光子Fock状态和相干状态，我们在EIT培养基中计算FI，并量化单光子探针的量子优势和局限性。 FI结构的分析还提供了一个清晰的图片，将光谱线形分类为两个不同的机制，即EIT和Aulter-Townes分裂（ATS）。这项工作提供了对单光子EIT频谱的系统分析，该频谱基于EIT提供了量子传感的基本知识，并加深了我们对$λ$ -Type媒体的光谱特征的理解。
Electromagnetically-induced-transparency (EIT) spectroscopy has been used as a sensitive sensor in quantum metrology applications. The sensitivity of a sensor strongly depends on the measurement precision of EIT spectrum. In this work, we present a theoretical study of the spectral lineshape measurement on a three-level $Λ$-type EIT media based on Fisher information (FI) analysis. Using two kinds of probing source: the single-photon Fock state and the coherent state, we calculate the FI in an EIT medium and quantify the quantum advantage and limitations of the single-photon probe. The analysis of FI structure also provides a clear picture to classify the spectral lineshape into two different regimes, the EIT and Aulter-Townes splitting (ATS). This work provides a systematic analysis of the single-photon EIT spectrum, which provides essential knowledge of quantum sensing based on EIT and deepens our understanding of spectral characteristics of $Λ$-type media.
