Long-range coupling mechanism and architecture for superconducting flux qubits

ORAL

Abstract

Devising a scalable mechanism enabling long-range interaction of qubits in a solid-state quantum computer is an important open problem. With only nearest neighbour interactions, gate error rates of order $10^{-7}$ or lower would be required to perform an arbitrarily large computation. If the right kinds of long- range interactions are available, gate error rates of order $10^ {-4}$, and possibly higher, would be acceptable. We discuss exactly what kinds of long-range interactions are required, present a simple mechanism for superconducting flux qubits, a scalable architecture based on this mechanism, and discuss the challenges on the road to physical realisation.

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Authors

  • Austin Fowler

    • Institute for Quantum Computing, University of Waterloo, Ontario, Canada

  • William Thompson

    • Institute for Quantum Computing, University of Waterloo, Ontario, Canada

  • Zhizhong Yan

    • Institute for Quantum Computing, University of Waterloo, Ontario, Canada

  • Ashley Stephens

    • Centre for Quantum Computer Technology, The University of Melbourne, Victoria, Australia

  • Frank Wilhelm

    • IQC and Physics Department, University of Waterloo
    • IQC and Physics Department, University of Waterloo, 200 University Ave W, Waterloo, ON, N2L 3G1, Canada
    • Institute for Quantum Computing, University of Waterloo, Ontario, Canada
    • Institute for Quantum Computing, Waterloo, Canada
    • University of Waterloo