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Publication . Article . Preprint . 2018

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

Diana Serrano; Jenny Karlsson; Alexandre Fossati; Alban Ferrier; Philippe Goldner;
Open Access
Published: 01 May 2018 Journal: Nature Communications (issn: 2041-1723, Copyright policy )
Country: France

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.

The long coherence time of rare-earth dopant spins in bulk crystals has made them attractive qubit candidates but creating nanoscale devices often introduce decoherence sources that reduce performance. Serrano et al. demonstrate all-optical control of rare earth doped nanoparticles with millisecond coherence times.

Subjects by Vocabulary

arXiv: Condensed Matter::Strongly Correlated Electrons Condensed Matter::Superconductivity

Microsoft Academic Graph classification: Millisecond Quantum Quantum technology Coherence (physics) Physics Spins Excitation Dynamical decoupling Magnetic field Condensed matter physics

Library of Congress Subject Headings: lcsh:Science lcsh:Q


Quantum Physics, Condensed Matter - Mesoscale and Nanoscale Physics, nanoqtech, nanoparticles, rare earths, quantum technologies, Science, Q, Quantum information, Qubits, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], General Physics and Astronomy, General Biochemistry, Genetics and Molecular Biology, General Chemistry, Quantum Physics (quant-ph), Mesoscale and Nanoscale Physics (cond-mat.mes-hall), FOS: Physical sciences, Article

Funded by
EC| NanOQTech
Nanoscale Systems for Optical Quantum Technologies
  • Funder: European Commission (EC)
  • Project Code: 712721
  • Funding stream: H2020 | RIA
Validated by funder
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