Readout and coherent control of precision atom qubits in isotopically pure silicon

ORAL

Abstract

The ability to address and individually control nuclear spins in solid state systems [1,2] has established them amongst the most promising platforms for quantum information science. Nuclear spin qubits in silicon in particular have demonstrated the longest coherence times by isotopically purifying the silicon host material, thereby eliminating the most dominant decoherence mechanism [3]. Here we demonstrate single-shot spin readout and control of multiple nuclear spins in precision engineered multi-donor quantum dot qubits [4,5] realised in 210 ppm isotopically pure Si-28. This work demonstrates the advantages of multiple donor nuclei in the operation of donor-based qubits.

[1] J. J. Pla et.al., High-fidelity readout and control of a nuclear spin qubit in silicon Nature 496, 334 (2013).

[2] M. V. Gurudev Dutt et. al, Science 316, 1312 (2007).

[3] J. T. Muhonen et.al, Storing quantum information for 30 seconds in a nanoelectronic device, Nature Nanotechnology 9, 986–991 (2014).

[4] Y. He et.al. A two-qubit gate between phosphorus donor electrons in silicon, Nature 571, 371 (2019).

[5] L. Fricke et.al., Coherent control of a donor-molecule electron spin qubit in silicon, Nat. Commun. 12, 3323 (2021)

*The research was supported by the Australian Research Council Centre of Excellence for Quantum Computation and Communication Technology (CE170100012), the US Army Research Office (W911NF-17-1-0202) and Silicon Quantum Computing Pty Ltd.

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Publication: P. Macha*, J. Reiner*, Y. Chung, S. H. Misha, S. K. Gorman, L. Kranz, I. Thorvaldson, S. Monir, S. Sutherland, B. Thorgrimsson, R. Rahman, J. G. Keizer, and M. Y. Simmons, A quantum register based on precision atom qubits in isotopically pure silicon, in preparation

Presenters

  • Pascal Macha

    • University of New South Wales
    • Silicon Quantum Computing Pty Ltd., Level 2, Newton Building, UNSW Sydney, Kensington, NSW 2052, Australia

Authors

  • Pascal Macha

    • University of New South Wales
    • Silicon Quantum Computing Pty Ltd., Level 2, Newton Building, UNSW Sydney, Kensington, NSW 2052, Australia

  • Jonathan Reiner

    • Silicon Quantum Computing Pty Ltd., Level 2, Newton Building, UNSW Sydney, Kensington, NSW 2052, Australia

  • Yousun Chung

    • University of New South Wales
    • Silicon Quantum Computing Pty Ltd., Level 2, Newton Building, UNSW Sydney, Kensington, NSW 2052, Australia

  • Saiful H Misha

    • Silicon Quantum Computing Pty Ltd., Level 2, Newton Building, UNSW Sydney, Kensington, NSW 2052, Australia

  • Samuel K Gorman

    • University of New South Wales
    • Silicon Quantum Computing Pty Ltd., Level 2, Newton Building, UNSW Sydney, Kensington, NSW 2052, Australia

  • Ludwik Kranz

    • University of New South Wales
    • Silicon Quantum Computing Pty Ltd., Level 2, Newton Building, UNSW Sydney, Kensington, NSW 2052, Australia

  • Ian Thorvaldson

    • University of New South Wales
    • Centre of Excellence for Quantum Computation and Communication Technology, School of Physics, University of New South Wales, Sydney, New South Wales 2052, Australia

  • Serjaum S Monir

    • University of New South Wales
    • UNSW Sydney
    • Centre of Excellence for Quantum Computation and Communication Technology, School of Physics, University of New South Wales, Sydney, New South Wales 2052, Australia

  • Sam Sutherland

    • Silicon Quantum Computing Pty Ltd., Level 2, Newton Building, UNSW Sydney, Kensington, NSW 2052, Australia

  • Brandur Thorgrimsson

    • University of New South Wales
    • Silicon Quantum Computing Pty Ltd., Level 2, Newton Building, UNSW Sydney, Kensington, NSW 2052, Australia

  • Rajib Rahman

    • University of New South Wales
    • Silicon Quantum Computing Pty Ltd., Level 2, Newton Building, UNSW Sydney, Kensington, NSW 2052, Australia

  • Joris G Keizer

    • University of New South Wales
    • Silicon Quantum Computing Pty Ltd., Level 2, Newton Building, UNSW Sydney, Kensington, NSW 2052, Australia

  • Michelle Y Simmons

    • University of New South Wales
    • Silicon Quantum Computing Pty Ltd., Level 2, Newton Building, UNSW Sydney, Kensington, NSW 2052, Australia; Centre of Excellence for Quantum Computation and Communication Tec