Lattice Surgery with a Twist: Simplifying Clifford Gates of Surface Codes

DOI 1 Citations
  • Daniel Litinski
    Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
  • Felix von Oppen
    Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany

Description

<jats:p>We present a planar surface-code-based scheme for fault-tolerant quantum computation which eliminates the time overhead of single-qubit Clifford gates, and implements long-range multi-target CNOT gates with a time overhead that scales only logarithmically with the control-target separation. This is done by replacing hardware operations for single-qubit Clifford gates with a classical tracking protocol. Inter-qubit communication is added via a modified lattice surgery protocol that employs twist defects of the surface code. The long-range multi-target CNOT gates facilitate magic state distillation, which renders our scheme fault-tolerant and universal.</jats:p>

Journal

  • Quantum

    Quantum 2 62-, 2018-05-04

    Verein zur Forderung des Open Access Publizierens in den Quantenwissenschaften

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