Integrating singlet-triplet qubits with superconducting resonators

ORAL

Abstract

Singlet-triplet qubits possess many appealing traits for building a quantum computer, in large part because they have reduced coupling to charge yet retain fast single-qubit gate speeds. While they are limited by their slow and short range two-qubit gate, incorporating superconducting resonators into the singlet-triplet qubit architecture shows promise for alleviating both issues. However, the singlet-triplet qubit is extremely sensitive to changes in its electrostatic environment, which can be affected both by the fabrication process for the resonator and by the presence of the proximal resonator gate. Moreover, because the singlet-triplet qubit has reduced coupling to charge, achieving high-fidelity gates requires a high-impedance resonator, which carries unique fabrication constraints. In my talk, I will discuss measurements we have done to study and quantify the impacts of these changes, as well as techniques we have developed to mitigate any negative effects.

*This work was supported by the Army Research Office Grants No. W911NF-15-1-0203 and No. W911NF-17-1-024

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Presenters

  • Shannon Harvey

    • Department of Physics, Harvard University
    • Harvard University

Authors

  • Shannon Harvey

    • Department of Physics, Harvard University
    • Harvard University

  • Charlotte Boettcher

    • Physics, Harvard University
    • Department of Physics, Harvard University
    • Dept. of Physics, Harvard University, USA

  • Saeed Fallahi

    • Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907 USA
    • Purdue University
    • Department of Physics and Astronomy, Purdue University
    • Dept. of Physics, Purdue University
    • Dept. of Physics and Astronomy, Purdue

  • Michael Manfra

    • Purdue University
    • Microsoft
    • Department of Physics and Astronomy and Station Q Purdue, Purdue University
    • Department of Physics and Astronomy, Purdue University
    • Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907 USA
    • Microsoft Station Q Purdue
    • Physics and Astronomy, Purdue University
    • Department of Physics and Astronomy, School of Materials Engineering and School of Electrical and Computer Engineering, Purdue University
    • Station Q Purdue and Department of Physics and Astronomy, Purdue University
    • Dept. of Physics, Purdue University
    • Department of Physics and Astronomy and Station Q Purdue, Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA
    • Dept. of Physics and Astronomy, Purdue
    • Purdue University, Station Q Purdue
    • Department of Physics and Astronomy, Station Q Purdue, and Birck Nanotechnology Center, Purdue University

  • Amir Yacoby

    • Harvard University
    • Department of Physics, Harvard University