Fisher information analysis on quantum-enhanced parameter estimation in electromagnetically-induced-transparency spectrum with single photons

• URL: http://arxiv.org/abs/2211.08762v2
• Date: Sat, 7 Jan 2023 05:23:37 GMT
• Title: Fisher information analysis on quantum-enhanced parameter estimation in electromagnetically-induced-transparency spectrum with single photons
• Authors: Pin-Ju Tsai and Lun-Ping Yuan and Ying-Cheng Chen
• Abstract summary: We present a theoretical study of the spectral lineshape measurement on a three-level $Lambda$-type EIT media. We classify the spectral lineshape into two different regimes, the EIT and Aulter-Townes splitting (ATS)
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: 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 $\Lambda$-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 $\Lambda$-type media.

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