Thirty millisecond electron-spin coherence in an erbium doped crystal

ORAL

Abstract

Rare-earth-ion doped solids are interesting physical systems because they have long lived states and record coherence times for both the optical and nuclear transitions [1]. Rare-earths with an odd number of electrons are also paramagnetic, with an electron-spin transition at GHz frequencies in magnetic fields less than 1 Tesla. Recently erbium doped calcium-tungstate (Er:CaWO4) has demonstrated 23ms electron-spin coherence at 10mK [2]. Measured using a superconducting micro-resonator and parametric amplifier [3], this is the longest electron-spin coherence observed on a magnetically-sensitive transition in a crystal with a natural abundance of nuclear spins. Here we demonstrate that the coherence can be extended up to 30ms by choosing a magnetic field orientation that minimizes the magnetic dipole-dipole interaction between the Er ions and W nuclei.

[1] Zhong, M. et al., Nature 517, 177-180 (2015)

[2] M. Le Dantec. et al., arXiv:2106.14974 (2021)

[3] A. Bienfait et al., Nature nanotechnology, vol. 11, no 3, p. 253, (2016)

We acknowledge Lincoln Labs for providing a Parametric Amplifier. We thank the Chaire Industrielle NASNIQ (grant ANR-17-CHIN-0001) supported by Atos, the project QIPSE (grant ACUHK403/15), the project MIRESPIN, SIRTEQ grant REIMIC and EU grant SMERC (792727)

*We acknowledge Lincoln Labs for providing a Parametric Amplifier. We thank the Chaire Industrielle NASNIQ (grant ANR-17-CHIN-0001) supported by Atos, the project QIPSE (grant ACUHK403/15), the project MIRESPIN, SIRTEQ grant REIMIC and EU grant SMERC (792727).

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Presenters

  • Milos Rancic

    • Quantronics Group, SPEC, CEA Saclay, Paris, France
    • CEA-Saclay

Authors

  • Milos Rancic

    • Quantronics Group, SPEC, CEA Saclay, Paris, France
    • CEA-Saclay

  • Marianne Le Dantec

    • Quantronics Group, SPEC, CEA Saclay, Paris, France
    • Universite Paris-Saclay

  • Emmanuel Flurin

    • Quantronics Group, SPEC, CEA Saclay, Paris, France
    • CEA-Saclay
    • CEA Saclay-Paris

  • Zhiren Wang

    • Quantronics Group, SPEC, CEA Saclay, Paris, France
    • Universite Paris-Saclay

  • Denis Vion

    • Quantronics Group, SPEC, CEA Saclay, Paris, France
    • CEA Saclay-Paris
    • CEA-Saclay
    • Universite Paris-Saclay

  • Patrice Bertet

    • Quantronics Group, SPEC, CEA Saclay, Paris, France
    • CEA Saclay-Paris
    • CEA Saclay
    • CEA-Saclay

  • Philippe Goldner

    • Chimie ParisTech, PSL University, Paris, France
    • Lab de Chimie Physique

  • Sylvain Bertaina

    • IM2NP, Faculté des Sciences et Techniques, Marseille, France
    • CNRS, Aix-Marseille Université, IM2NP (UMR 7334), Institut Matériaux Microélectronique et Nanosciences de Provence, Marseille, France
    • Institut Matériaux Microélectronique Nanosciences de Provence
    • CNRS and University of Aix-Marseille

  • Thierry Chaneliere

    • Institut Néel, Univ. Grenoble Alpes, Grenoble, France
    • Universite Grenoble Alpes
    • institut neel

  • Daniel Esteve

    • Quantronics Group, SPEC, CEA Saclay, Paris, France
    • CEA Saclay-Paris
    • CEA-Saclay

  • Sen Lin

    • Department of Physics and The Hong Kong Institute of Quantum Information Science and Technology, The Chinese University of Hong Kong, Hong Kong, China
    • Chinese University of Hong Kong

  • Ren-Bao Liu

    • Chinese University of Hong Kong