Group III Defects in Diamond for Quantum Information Applications

ORAL

Abstract

Point defects in wide bandgap semiconductors have emerged as leading spin-photon interfaces for applications in quantum information science. In particular, several types of color centers in diamond have been characterised as promising candidates for spin-photon interfaces. However, no color center has yet demonstrated the required spin initialisation, spin coherence and optical stability required for easy integration into quantum devices. Here, we discuss theoretical and experimental results for a new class of color centers, the group III vacancy complexes in diamond, and in particular the negatively-charged gallium vacancy center. These group III color centers are predicted to be stable in an inversion-symmetric configuration, which makes their optical transition resilient to charge noise, and therefore well-suited to integration in nanostructures. Furthermore, they are thermodynamically stable in a spin-1 charge state, which gives them desirable level structures and spin coherence properties for quantum information applications. Based on these results, we comment on the suitability of these new color centers as spin-photon interfaces.

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Presenters

  • Isaac Harris

    • Massachusetts Institute of Technology MIT
    • SEAS, Harvard University
    • Massachusetts Institute of Technology

Authors

  • Isaac Harris

    • Massachusetts Institute of Technology MIT
    • SEAS, Harvard University
    • Massachusetts Institute of Technology

  • Christopher Ciccarino

    • Harvard University
    • School of Engineering and Applied Sciences, Harvard University

  • Matthew Trusheim

    • Massachusetts Institute of Technology MIT
    • Harvard University

  • Johannes Flick

    • Flatiron Institute
    • Center for Computational Quantum Physics, Simons Foundatioon
    • Center for Computational Quantum Physics, Flatiron Institute

  • Dirk R. Englund

    • Massachusetts Institute of Technology
    • Massachusetts Institute of Technology MIT
    • Electrical Engineering and Computer Science, Massachusetts Institute of Technology MIT
    • Research Laboratory of Electronics, Massachusetts Institute of Technology

  • Prineha Narang

    • SEAS, Harvard University
    • Harvard University
    • John A. Paulson School of Engineering and Applied Sciences, Harvard University
    • School of Engineering and Applied Sciences, Harvard University
    • Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University
    • Harvard University; Aliro Technologies