A wavelength-convertible quantum memory: Controlled echo

Abstract Quantum coherence control is reinvestigated for a new physical insight in quantum nonlinear optics and applied for a wavelength-convertible quantum memory in a solid ensemble whose spin states are inhomogeneously broadened. Unlike typical atomic media whose spin decays are homogeneous, a sp...

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Autor principal:	Byoung S. Ham
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f43e3d7dc00549068c4464ef0e477d0b
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spelling	oai:doaj.org-article:f43e3d7dc00549068c4464ef0e477d0b2021-12-02T16:08:02ZA wavelength-convertible quantum memory: Controlled echo10.1038/s41598-018-28776-12045-2322https://doaj.org/article/f43e3d7dc00549068c4464ef0e477d0b2018-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-28776-1https://doaj.org/toc/2045-2322Abstract Quantum coherence control is reinvestigated for a new physical insight in quantum nonlinear optics and applied for a wavelength-convertible quantum memory in a solid ensemble whose spin states are inhomogeneously broadened. Unlike typical atomic media whose spin decays are homogeneous, a spin inhomogeneously broadened solid ensemble requires a counter-intuitive quantum coherence control to avoid spontaneous emission-caused quantum noises. Such a quantum coherence control in a solid ensemble satisfying both near perfect retrieval efficiency and ultralong photon storage offers a solid framework to quantum repeaters, scalable qubit generations, quantum cryptography, and highly sensitive magnetometry. Here, the basic physics of the counter-intuitive quantum coherence control is presented not only for a fundamental understanding of collective ensemble phase control but also for a coherence conversion mechanism between optical and spin states involving Raman rephasing.Byoung S. HamNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-8 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Byoung S. Ham A wavelength-convertible quantum memory: Controlled echo
description	Abstract Quantum coherence control is reinvestigated for a new physical insight in quantum nonlinear optics and applied for a wavelength-convertible quantum memory in a solid ensemble whose spin states are inhomogeneously broadened. Unlike typical atomic media whose spin decays are homogeneous, a spin inhomogeneously broadened solid ensemble requires a counter-intuitive quantum coherence control to avoid spontaneous emission-caused quantum noises. Such a quantum coherence control in a solid ensemble satisfying both near perfect retrieval efficiency and ultralong photon storage offers a solid framework to quantum repeaters, scalable qubit generations, quantum cryptography, and highly sensitive magnetometry. Here, the basic physics of the counter-intuitive quantum coherence control is presented not only for a fundamental understanding of collective ensemble phase control but also for a coherence conversion mechanism between optical and spin states involving Raman rephasing.
format	article
author	Byoung S. Ham
author_facet	Byoung S. Ham
author_sort	Byoung S. Ham
title	A wavelength-convertible quantum memory: Controlled echo
title_short	A wavelength-convertible quantum memory: Controlled echo
title_full	A wavelength-convertible quantum memory: Controlled echo
title_fullStr	A wavelength-convertible quantum memory: Controlled echo
title_full_unstemmed	A wavelength-convertible quantum memory: Controlled echo
title_sort	wavelength-convertible quantum memory: controlled echo
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/f43e3d7dc00549068c4464ef0e477d0b
work_keys_str_mv	AT byoungsham awavelengthconvertiblequantummemorycontrolledecho AT byoungsham wavelengthconvertiblequantummemorycontrolledecho
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A wavelength-convertible quantum memory: Controlled echo

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