Extended coherence of electron and nuclear spins in epitaxial purified silicon devices fabricated by atomic lithography.

ORAL

Abstract

The nuclear spin free environment in isotopically pure silicon dramatically supresses magnetic noise, giving rise to unprecedented coherence times of spin qubits [1]. Likewise, the single crystal environment provided by epitaxial growth exhibits extremely low level of charge noise, crucial for high performance of electrically controlled operations of a qubit in a nanoelectronic device [2]. We have recently realised precision donor qubits in isotopically pure crystalline silicon-28 and present our results to benchmark against charge and magnetic noise measurements in natural silicon, highlighting that they achieve the necessary coherence properties for quantum information processing.

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

[2] L. Kranz et al. Exploiting a Single-Crystal Environment to Minimize the Charge Noise on Qubits in Silicon, Advanced Materials 32 (40) 2003361 (2020)

*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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Presenters

  • Jonathan Reiner

    • University of New South Wales

Authors

  • Jonathan Reiner

    • University of New South Wales

  • Pascal Macha

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

  • Saiful Haque Misha

    • University of New South Wales

  • Yousun Chung

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

  • Christian Lehner

    • University of New South Wales

  • Daniel Keith

    • UNSW
    • University of New South Wales

  • Ludwik Kranz

    • University of New South Wales
    • 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

  • Yu-ling Hsueh

    • University of New South Wales

  • 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