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