Optical and spin coherence of Er spin qubits in epitaxial cerium dioxide on silicon

Robust spin-photon interfaces with optical transitions in the telecommunication band are essential for quantum networking technologies. Erbium (Er) ions are the ideal candidate with environmentally protected transitions in telecom-C band. Finding the right technologically compatible host material to enable long-lived spins remains a major hurdle. We introduce a new platform based on Er ions in cerium dioxide (CeO2) as a nearly-zero nuclear spin environment (0.04%) epitaxially grown on silicon, offering silicon compatibility for opto-electrical devices. Our studies focus on Er3+ ions and show a narrow homogeneous linewidth of 440 kHz with an optical coherence time of 0.72 μs at 3.6 K. The reduced nuclear spin noise enables a slow spin-lattice relaxation with a spin relaxation time up to 2.5 ms and an electron spin coherence time of 0.66 μs (in the isolated ion limit) at 3.6 K. These findings highlight the potential of Er3+:CeO2 platform for quantum networks applications.

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Publication Details

Journal
npj Quantum Information
Published
2024-11-20
DOI
https://doi.org/10.1038/s41534-024-00903-z
Citations
9
Primary Topic
Quantum optics and atomic interactions
Type
article
Field-Weighted Citation Impact
3.04

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article

Optical and spin coherence of Er spin qubits in epitaxial cerium dioxide on silicon

Alan Dibos, D. D. Awschalom, Oleg G. Poluektov, Gregory D. Grant et al.
9 citations
npj Quantum Information
Quantum optics and atomic interactions
3.04
article

Optical and spin coherence of Er spin qubits in epitaxial cerium dioxide on silicon

Alan Dibos, D. D. Awschalom, Oleg G. Poluektov, Gregory D. Grant, Supratik Guha, Jens Niklas, Michael T. Solomon, F. Joseph Heremans, Jasleen K. Bindra, Jiefei Zhang, Jonathan C. Marcks, Ignas Masiulionis
article en
9 citations

Abstract

Robust spin-photon interfaces with optical transitions in the telecommunication band are essential for quantum networking technologies. Erbium (Er) ions are the ideal candidate with environmentally protected transitions in telecom-C band. Finding the right technologically compatible host material to enable long-lived spins remains a major hurdle. We introduce a new platform based on Er ions in cerium dioxide (CeO2) as a nearly-zero nuclear spin environment (0.04%) epitaxially grown on silicon, offering silicon compatibility for opto-electrical devices. Our studies focus on Er3+ ions and show a narrow homogeneous linewidth of 440 kHz with an optical coherence time of 0.72 μs at 3.6 K. The reduced nuclear spin noise enables a slow spin-lattice relaxation with a spin relaxation time up to 2.5 ms and an electron spin coherence time of 0.66 μs (in the isolated ion limit) at 3.6 K. These findings highlight the potential of Er3+:CeO2 platform for quantum networks applications.

npj Quantum InformationVol. 10(1)
Argonne National Laboratory (US), University of Chicago (US)
U.S. Department of Energy, Office of Science, Basic Energy Sciences, Air Force Office of Scientific Research, Argonne National Laboratory
Openalex Percentile: Top 8%
Quantum optics and atomic interactions
3.04
DOIOpen Access PDFOpenAlex
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