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Fault-tolerant interface between quantum memories and quantum processors

Author

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  • Hendrik Poulsen Nautrup

    (University of Innsbruck)

  • Nicolai Friis

    (University of Innsbruck
    Institute for Quantum Optics and Quantum Information, Austrian Academy of Sciences)

  • Hans J. Briegel

    (University of Innsbruck)

Abstract

Topological error correction codes are promising candidates to protect quantum computations from the deteriorating effects of noise. While some codes provide high noise thresholds suitable for robust quantum memories, others allow straightforward gate implementation needed for data processing. To exploit the particular advantages of different topological codes for fault-tolerant quantum computation, it is necessary to be able to switch between them. Here we propose a practical solution, subsystem lattice surgery, which requires only two-body nearest-neighbor interactions in a fixed layout in addition to the indispensable error correction. This method can be used for the fault-tolerant transfer of quantum information between arbitrary topological subsystem codes in two dimensions and beyond. In particular, it can be employed to create a simple interface, a quantum bus, between noise resilient surface code memories and flexible color code processors.

Suggested Citation

  • Hendrik Poulsen Nautrup & Nicolai Friis & Hans J. Briegel, 2017. "Fault-tolerant interface between quantum memories and quantum processors," Nature Communications, Nature, vol. 8(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-01418-2
    DOI: 10.1038/s41467-017-01418-2
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