Millisecond electron spin coherence time in <sup>167</sup>Er<sup>3+</sup>: Y<sub>2</sub>O<sub>3</sub> at milliKelvin temperatures

ORAL

Abstract

Erbium (Er3+) ions in solid-state hosts are a promising platform for quantum networks and hybrid quantum systems [1] due to their long spin coherence times and telecom band optical transition at 1.54 μm. We perform continuous wave (cw) and pulsed Electron Spin Resonance (ESR) spectroscopy of erbium (167Er3+) dopants in Y2O3 [2]. We report the estimated electron Zeeman g and hyperfine A tensor measured with X-band cw-ESR. We perform milliKelvin pulsed ESR at 5 GHz to measure Hahn-Echo electron spin coherence time of 1.5 millisecond and with a further enhancement to 8 milliseconds with dynamic decoupling. We further report the device development of superconducting low impedance resonator on epitaxially grown thin-film Y2O3 [3] to allow for further increased coupling rates between the cavity photons and electron spins on the order of kHz for high-sensitivity ESR.

[1] Lewis A. Williamson et al., Phys. Rev. Lett. 113, 203601 (2014)
[2] R. Fukumori et at, Phys. Rev. B 101, 214202 (2020)
[3] Manish Singh et al, APL Materials 8, 03111 (2020)

*We acknowledge funding support from:
-National Science Foundation EAGER award No 1843044,
-MRSEC center, NSF Award DMR-2011854

–

Presenters

  • Shobhit Gupta

    • University of Chicago

Authors

  • Shobhit Gupta

    • University of Chicago

  • Yuxiang Pei

    • University of Chicago

  • Haito Zhang

    • Corning Inc

  • Jun Yang

    • Corning Inc

  • Manish Kumar Singh

    • University of Chicago

  • David I Schuster

    • University of Chicago
    • The James Franck Institute and Department of Physics, University of Chicago
    • The James Franck Institute and Department of Physics, The University of Chicago

  • Tian Zhong

    • University of Chicago