Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

arXiv:1910.07907 · Physical Review X

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

Sacha Welinski, Alexey Tiranov, Moritz Businger, Alban Ferrier, Mikael Afzelius, Philippe Goldner

Published Sep 16, 2020• 26 citations
arXivHTMLPDF

Abstract

A technique to spread the polarization of spins from an initial small group of optically excited spins drastically increases the spin and optical coherence time, a key parameter for quantum technologies.
DOI
10.1103/physrevx.10.031060

Related papers

Optical Coherence Increase by Diffusion Enhanced Optical Pumping in a Rare-Earth Doped Crystal

Sacha Welinski, Alban Ferrier, Philippe Goldner +3 more

We demonstrate a new spin polarization mechanism that combines optical pumping with spin diffusion to achieve large spin polarization in 171Yb3+:Y2SiO5. This is used to increase optical coherence lifetime from 0.3 to 0.8 ms.

Conference on Lasers and Electro-Optics•Jan 1, 2021•0 citations

Long optical coherence times in a rare-earth-doped antiferromagnet

Masaya Hiraishi, Zachary H. Roberts, Gavin G. G. King +2 more

arXiv:2411.05182•Nature Physics•May 22, 2025•7 citations

All-optical control of long-lived nuclear spins in rare-earth doped nanoparticles

Diana Serrano, Jenny Karlsson, Alexandre Fossati +2 more

Abstract Nanoscale systems that coherently couple to light and possess spins offer key capabilities for quantum technologies. However, an outstanding challenge is to preserve properties, and especially optical and spin coherence lifetimes, at the nanoscale. Here, we report optically controlled nuclear spins with long coherence lifetimes (T2) in rare-earth-doped nanoparticles. We detect spins echoes and measure a spin coherence lifetime of 2.9 ± 0.3 ms at 5 K under an external magnetic field of 9 mT, a T2 value comparable to those obtained in bulk rare-earth crystals. Moreover, we achieve spin T2 extension using all-optical spin dynamical decoupling and observe high fidelity between excitation and echo phases. Rare-earth-doped nanoparticles are thus the only nano-material in which optically controlled spins with millisecond coherence lifetimes have been reported. These results open the way to providing quantum light-atom-spin interfaces with long storage time within hybrid architectures.

•Jan 1, 2018•48 citations

All-optical control of long-lived nuclear spins in rare-earth doped nanoparticles

Diana Serrano, Jenny Karlsson, Alexandre Fossati +2 more

Abstract Nanoscale systems that coherently couple to light and possess spins offer key capabilities for quantum technologies. However, an outstanding challenge is to preserve properties, and especially optical and spin coherence lifetimes, at the nanoscale. Here, we report optically controlled nuclear spins with long coherence lifetimes ( T 2 ) in rare-earth-doped nanoparticles. We detect spins echoes and measure a spin coherence lifetime of 2.9 ± 0.3 ms at 5 K under an external magnetic field of 9 mT, a T 2 value comparable to those obtained in bulk rare-earth crystals. Moreover, we achieve spin T 2 extension using all-optical spin dynamical decoupling and observe high fidelity between excitation and echo phases. Rare-earth-doped nanoparticles are thus the only nano-material in which optically controlled spins with millisecond coherence lifetimes have been reported. These results open the way to providing quantum light-atom-spin interfaces with long storage time within hybrid architectures.

arXiv:1711.03934•Nature Communications•May 23, 2018•60 citations

Optical pumping experiments to increase the polarization in nuclear-spin based quantum computers

Anne S. Verhulst

•Jan 1, 2004•5 citations

Twenty millisecond electron-spin coherence in an erbium doped crystal

Marianne Le Dantec, Miloš Rančić, Emmanuel Flurin +8 more

Bulletin of the American Physical Society•Mar 15, 2021•0 citations
Abstract Nanoscale systems that coherently couple to light and possess spins offer key capabilities for quantum technologies. However, an outstanding challenge is to preserve properties, and especially optical and spin coherence lifetimes, at the nanoscale. Here, we report optically controlled nuclear spins with long coherence lifetimes (T2) in rare-earth-doped nanoparticles. We detect spins echoes and measure a spin coherence lifetime of 2.9 ± 0.3 ms at 5 K under an external magnetic field of 9 mT, a T2 value comparable to those obtained in bulk rare-earth crystals. Moreover, we achieve spin T2 extension using all-optical spin dynamical decoupling and observe high fidelity between excitation and echo phases. Rare-earth-doped nanoparticles are thus the only nano-material in which optically controlled spins with millisecond coherence lifetimes have been reported. These results open the way to providing quantum light-atom-spin interfaces with long storage time within hybrid architectures.
Abstract Nanoscale systems that coherently couple to light and possess spins offer key capabilities for quantum technologies. However, an outstanding challenge is to preserve properties, and especially optical and spin coherence lifetimes, at the nanoscale. Here, we report optically controlled nuclear spins with long coherence lifetimes ( T 2 ) in rare-earth-doped nanoparticles. We detect spins echoes and measure a spin coherence lifetime of 2.9 ± 0.3 ms at 5 K under an external magnetic field of 9 mT, a T 2 value comparable to those obtained in bulk rare-earth crystals. Moreover, we achieve spin T 2 extension using all-optical spin dynamical decoupling and observe high fidelity between excitation and echo phases. Rare-earth-doped nanoparticles are thus the only nano-material in which optically controlled spins with millisecond coherence lifetimes have been reported. These results open the way to providing quantum light-atom-spin interfaces with long storage time within hybrid architectures.