Toward optically active molecular spin qubits with narrow optical transitions at technologically relevant frequencies

ORAL

Abstract

Optically active molecular spins are a promising, emerging category of solid state spin qubit. This new class of quantum system features microwave-addressable ground state spins coupled to optical transitions - allowing for control and coupling schemes much like defect/dopant centers in covalent solids, but hosted within a low-dimensional, chemically synthesizable and modifiable material system. Typical qubits in this class possess broad (nanometer scale) optical lines, limiting opportunities for hybrid systems and resolution of spin-optical measurement critical to the development of quantum technologies in this emerging category. Working within this context, we show experimental progress toward the creation of optically active molecular spin qubits possessing narrow optical transitions at technologically relevant frequencies in the near infrared. We additionally demonstrate coupling of these transitions to a ground state spin and highlight how physically motivated synthetic substitutions can dramatically alter the optical properties of these materials.

**This work was supported by the Department of Energy, Q-NEXT, the National Science Foundation, and the Swiss National Science Foundation

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Presenters

  • Grant T Smith

    • Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, USA
    • University of Chicago

Authors

  • Grant T Smith

    • Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, USA
    • University of Chicago

  • Leah R Weiss

    • University of Chicago
    • Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, USA
    • Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL 60637, USA.
    • Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL 60637, USA

  • Ryan A Murphy

    • Department of Chemistry, University of California, Berkeley, CA, USA
    • University of California, Berkeley

  • Bahman Golesorkhi

    • Department of Chemistry, University of California, Berkeley, CA, USA
    • University of California, Berkeley

  • José A Méndez Méndez

    • Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, USA
    • University of Chicago

  • Jeffrey R Long

    • Department of Chemistry, University of California, Berkeley, CA, USA
    • University of California, Berkeley

  • David D Awschalom

    • University of Chicago
    • Pritzker School of Molecular Engineering and Department of Physics, University of Chicago, Chicago, IL, USA
    • Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL 60637, USA.
    • Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL 60637, USA
    • Argonne National Laboratory