Coherence Time Extension by Large-Scale Optical Spin Polarization in a Rare-Earth Doped Crystal

Optically addressable spins are actively investigated in quantum communication, processing, and sensing. Optical and spin coherence lifetimes, which determine quantum operation fidelity and storage time, are often limited by spin-spin interactions, which can be decreased by polarizing spins. Spin po...

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Autores principales:	Sacha Welinski, Alexey Tiranov, Moritz Businger, Alban Ferrier, Mikael Afzelius, Philippe Goldner
Formato:	article
Lenguaje:	EN
Publicado:	American Physical Society 2020
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/a2746bccd40549d0a981fd6ec1394ce3
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spelling	oai:doaj.org-article:a2746bccd40549d0a981fd6ec1394ce32021-12-02T11:21:57ZCoherence Time Extension by Large-Scale Optical Spin Polarization in a Rare-Earth Doped Crystal10.1103/PhysRevX.10.0310602160-3308https://doaj.org/article/a2746bccd40549d0a981fd6ec1394ce32020-09-01T00:00:00Zhttp://doi.org/10.1103/PhysRevX.10.031060http://doi.org/10.1103/PhysRevX.10.031060https://doaj.org/toc/2160-3308Optically addressable spins are actively investigated in quantum communication, processing, and sensing. Optical and spin coherence lifetimes, which determine quantum operation fidelity and storage time, are often limited by spin-spin interactions, which can be decreased by polarizing spins. Spin polarization can be achieved using optical pumping, large magnetic fields, or mK-range temperatures. Here, we show that optical pumping of a small fraction of ions with a fixed-frequency laser, coupled with spin-spin interactions and spin diffusion, leads to substantial spin polarization in a paramagnetic rare-earth doped crystal, ^{171}Yb^{3+}∶Y_{2}SiO_{5}. Indeed, more than 90% spin polarization has been achieved at 2 K and zero magnetic field. Using this spin polarization mechanism, we further demonstrate an increase in optical coherence lifetime from 0.3 ms to 0.8 ms, due to a strong decrease in spin-spin interactions. This effect opens the way to new schemes for obtaining long optical and spin coherence lifetimes in various solid-state systems such as ensembles of rare-earth ions or color centers in diamond, which are of interest for a broad range of quantum technologies.Sacha WelinskiAlexey TiranovMoritz BusingerAlban FerrierMikael AfzeliusPhilippe GoldnerAmerican Physical SocietyarticlePhysicsQC1-999ENPhysical Review X, Vol 10, Iss 3, p 031060 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Sacha Welinski Alexey Tiranov Moritz Businger Alban Ferrier Mikael Afzelius Philippe Goldner Coherence Time Extension by Large-Scale Optical Spin Polarization in a Rare-Earth Doped Crystal
description	Optically addressable spins are actively investigated in quantum communication, processing, and sensing. Optical and spin coherence lifetimes, which determine quantum operation fidelity and storage time, are often limited by spin-spin interactions, which can be decreased by polarizing spins. Spin polarization can be achieved using optical pumping, large magnetic fields, or mK-range temperatures. Here, we show that optical pumping of a small fraction of ions with a fixed-frequency laser, coupled with spin-spin interactions and spin diffusion, leads to substantial spin polarization in a paramagnetic rare-earth doped crystal, ^{171}Yb^{3+}∶Y_{2}SiO_{5}. Indeed, more than 90% spin polarization has been achieved at 2 K and zero magnetic field. Using this spin polarization mechanism, we further demonstrate an increase in optical coherence lifetime from 0.3 ms to 0.8 ms, due to a strong decrease in spin-spin interactions. This effect opens the way to new schemes for obtaining long optical and spin coherence lifetimes in various solid-state systems such as ensembles of rare-earth ions or color centers in diamond, which are of interest for a broad range of quantum technologies.
format	article
author	Sacha Welinski Alexey Tiranov Moritz Businger Alban Ferrier Mikael Afzelius Philippe Goldner
author_facet	Sacha Welinski Alexey Tiranov Moritz Businger Alban Ferrier Mikael Afzelius Philippe Goldner
author_sort	Sacha Welinski
title	Coherence Time Extension by Large-Scale Optical Spin Polarization in a Rare-Earth Doped Crystal
title_short	Coherence Time Extension by Large-Scale Optical Spin Polarization in a Rare-Earth Doped Crystal
title_full	Coherence Time Extension by Large-Scale Optical Spin Polarization in a Rare-Earth Doped Crystal
title_fullStr	Coherence Time Extension by Large-Scale Optical Spin Polarization in a Rare-Earth Doped Crystal
title_full_unstemmed	Coherence Time Extension by Large-Scale Optical Spin Polarization in a Rare-Earth Doped Crystal
title_sort	coherence time extension by large-scale optical spin polarization in a rare-earth doped crystal
publisher	American Physical Society
publishDate	2020
url	https://doaj.org/article/a2746bccd40549d0a981fd6ec1394ce3
work_keys_str_mv	AT sachawelinski coherencetimeextensionbylargescaleopticalspinpolarizationinarareearthdopedcrystal AT alexeytiranov coherencetimeextensionbylargescaleopticalspinpolarizationinarareearthdopedcrystal AT moritzbusinger coherencetimeextensionbylargescaleopticalspinpolarizationinarareearthdopedcrystal AT albanferrier coherencetimeextensionbylargescaleopticalspinpolarizationinarareearthdopedcrystal AT mikaelafzelius coherencetimeextensionbylargescaleopticalspinpolarizationinarareearthdopedcrystal AT philippegoldner coherencetimeextensionbylargescaleopticalspinpolarizationinarareearthdopedcrystal
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Coherence Time Extension by Large-Scale Optical Spin Polarization in a Rare-Earth Doped Crystal

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