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Article

Measuring the pth-Order Correlation Function of Light Field via Two-Level Atoms

by
Wangjun Lu
1,2,
Cuilu Zhai
1 and
Shiqing Tang
3,*
1
Department of Maths and Physics, Hunan Institute of Engineering, Xiangtan 411104, China
2
Department of Physics, Zhejiang Institute of Modern Physics, Zhejiang University, Hangzhou 310027, China
3
College of Physics and Electronic Engineering, Hengyang Normal University, Hengyang 421002, China
*
Author to whom correspondence should be addressed.
Photonics 2022, 9(10), 727; https://doi.org/10.3390/photonics9100727
Submission received: 19 September 2022 / Revised: 1 October 2022 / Accepted: 3 October 2022 / Published: 5 October 2022
(This article belongs to the Special Issue Quantum Optics: Science and Applications)
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Abstract

In this paper, we present a method for measuring arbitrary-order correlation functions of the light field using a two-level atomic system. Theoretically, light field information should be mapped onto the atomic system after the light interacts with the atom. Therefore, we can measure the atomic system and thus obtain information about the light field. We study two typical models, the p-photon Jaynes–Cummings model, and the p-photon Tavis–Cummings model. In both models, we find that the pth-order correlation function of an unknown light field can be obtained by measuring the instantaneous change of energy of the two-level atoms with the aid of a known reference light field. Moreover, we find that the interactions other than the dipole interactions between light and atoms have no effect on the measurement results.
Keywords: correlation functions; indirect measurement; two-level atoms; Jaynes–Cummings model; Tavis–Cummings model correlation functions; indirect measurement; two-level atoms; Jaynes–Cummings model; Tavis–Cummings model

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MDPI and ACS Style

Lu, W.; Zhai, C.; Tang, S. Measuring the pth-Order Correlation Function of Light Field via Two-Level Atoms. Photonics 2022, 9, 727. https://doi.org/10.3390/photonics9100727

AMA Style

Lu W, Zhai C, Tang S. Measuring the pth-Order Correlation Function of Light Field via Two-Level Atoms. Photonics. 2022; 9(10):727. https://doi.org/10.3390/photonics9100727

Chicago/Turabian Style

Lu, Wangjun, Cuilu Zhai, and Shiqing Tang. 2022. "Measuring the pth-Order Correlation Function of Light Field via Two-Level Atoms" Photonics 9, no. 10: 727. https://doi.org/10.3390/photonics9100727

APA Style

Lu, W., Zhai, C., & Tang, S. (2022). Measuring the pth-Order Correlation Function of Light Field via Two-Level Atoms. Photonics, 9(10), 727. https://doi.org/10.3390/photonics9100727

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