Temporal analog of Fabry-Pérot resonator via coherent population trapping

Abstract Ramsey spectroscopy via coherent population trapping (CPT) is essential in precision measurements. The conventional CPT-Ramsey fringes contain numbers of almost identical oscillations and so that it is difficult to identify the central fringe. Here we experimentally demonstrate a temporal a...

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Autores principales:	Ruihuan Fang, Chengyin Han, Xunda Jiang, Yuxiang Qiu, Yuanyuan Guo, Minhua Zhao, Jiahao Huang, Bo Lu, Chaohong Lee
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95
Acceso en línea:	https://doaj.org/article/f10c39a1e9a042aca00092b7e80fabfe
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spelling	oai:doaj.org-article:f10c39a1e9a042aca00092b7e80fabfe2021-12-02T18:51:13ZTemporal analog of Fabry-Pérot resonator via coherent population trapping10.1038/s41534-021-00479-y2056-6387https://doaj.org/article/f10c39a1e9a042aca00092b7e80fabfe2021-09-01T00:00:00Zhttps://doi.org/10.1038/s41534-021-00479-yhttps://doaj.org/toc/2056-6387Abstract Ramsey spectroscopy via coherent population trapping (CPT) is essential in precision measurements. The conventional CPT-Ramsey fringes contain numbers of almost identical oscillations and so that it is difficult to identify the central fringe. Here we experimentally demonstrate a temporal analog of Fabry–Pérot resonator via double-Λ CPT of laser-cooled 87Rb atoms. By inserting a periodic CPT pulse train between the two CPT-Ramsey pulses, due to the constructive interference of spin coherence, the transmission spectrum appears as a comb of equidistant peaks in frequency domain and thus the central Ramsey fringe can be easily identified. From the five-level Bloch equations for our double-Λ system, we find that the multi-pulse CPT interference can be regarded as a temporal analog of Fabry–Pérot resonator. Because of the small amplitude difference between the two Landé g factors, each peak splits into two when the external magnetic field is not too weak. This splitting is exactly linear with the magnetic field strength and thus can be used for measuring a magnetic field without involving magneto-sensitive transitions.Ruihuan FangChengyin HanXunda JiangYuxiang QiuYuanyuan GuoMinhua ZhaoJiahao HuangBo LuChaohong LeeNature PortfolioarticlePhysicsQC1-999Electronic computers. Computer scienceQA75.5-76.95ENnpj Quantum Information, Vol 7, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95
spellingShingle	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95 Ruihuan Fang Chengyin Han Xunda Jiang Yuxiang Qiu Yuanyuan Guo Minhua Zhao Jiahao Huang Bo Lu Chaohong Lee Temporal analog of Fabry-Pérot resonator via coherent population trapping
description	Abstract Ramsey spectroscopy via coherent population trapping (CPT) is essential in precision measurements. The conventional CPT-Ramsey fringes contain numbers of almost identical oscillations and so that it is difficult to identify the central fringe. Here we experimentally demonstrate a temporal analog of Fabry–Pérot resonator via double-Λ CPT of laser-cooled 87Rb atoms. By inserting a periodic CPT pulse train between the two CPT-Ramsey pulses, due to the constructive interference of spin coherence, the transmission spectrum appears as a comb of equidistant peaks in frequency domain and thus the central Ramsey fringe can be easily identified. From the five-level Bloch equations for our double-Λ system, we find that the multi-pulse CPT interference can be regarded as a temporal analog of Fabry–Pérot resonator. Because of the small amplitude difference between the two Landé g factors, each peak splits into two when the external magnetic field is not too weak. This splitting is exactly linear with the magnetic field strength and thus can be used for measuring a magnetic field without involving magneto-sensitive transitions.
format	article
author	Ruihuan Fang Chengyin Han Xunda Jiang Yuxiang Qiu Yuanyuan Guo Minhua Zhao Jiahao Huang Bo Lu Chaohong Lee
author_facet	Ruihuan Fang Chengyin Han Xunda Jiang Yuxiang Qiu Yuanyuan Guo Minhua Zhao Jiahao Huang Bo Lu Chaohong Lee
author_sort	Ruihuan Fang
title	Temporal analog of Fabry-Pérot resonator via coherent population trapping
title_short	Temporal analog of Fabry-Pérot resonator via coherent population trapping
title_full	Temporal analog of Fabry-Pérot resonator via coherent population trapping
title_fullStr	Temporal analog of Fabry-Pérot resonator via coherent population trapping
title_full_unstemmed	Temporal analog of Fabry-Pérot resonator via coherent population trapping
title_sort	temporal analog of fabry-pérot resonator via coherent population trapping
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/f10c39a1e9a042aca00092b7e80fabfe
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Temporal analog of Fabry-Pérot resonator via coherent population trapping

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