Progress in exchange-based 2-qubit logic gates with donors in silicon

ORAL

Abstract

Donor spin qubits have been extensively studied for future applications in quantum computing. In top-down ion-implanted devices, coherence times as long as 30 seconds and gate fidelities beyond 99.9% have been demonstrated. Building on those achievements, we report on progress towards two-qubit operations mediated by exchange interactions. Newly fabricated devices with an increased implantation dose revealed a high number of donors in the vicinity of a single-electron transistor. Electron spin resonance (ESR) spectra show spectroscopic evidence of exchange-coupled donor pairs. Experiments are underway to demonstrate 2-qubit logic gates using state-conditional ESR pulses.

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Presenters

  • Mateusz Madzik

    Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, University of New South Wales

Authors

  • Mateusz Madzik

    Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, University of New South Wales

  • Arne Laucht

    Center for Quantum Computation and Communication Technology, University of New South Wales, Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, University of New South Wales

  • Vincent Mourik

    Center for Quantum Computation and Communication Technology, University of New South Wales, Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, University of New South Wales

  • Fay Hudson

    Center for Quantum Computation and Communication Technology, University of New South Wales, Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, University of New South Wales

  • Kohei Itoh

    School of Fundamental Science and Technology, Keio University

  • David Jamieson

    Centre for Quantum Computation and Communication Technology, School of Physics, University of Melbourne

  • Andrew Dzurak

    Center for Quantum Computation and Communication Technology, University of New South Wales, Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, University of New South Wales, The University of New South Wales, Univ of New South Wales, University of New South Wales

  • Andrea Morello

    Center for Quantum Computation and Communication Technology, University of New South Wales, Centre for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, University of New South Wales