Efficient Toffoli Gate in Circuit Quantum Electrodynamics

ORAL

Abstract

The fidelity of quantum gates in circuit quantum electrodynamics is typically limited by qubit decoherence. As such, significant improvements can be realized by shortening gate duration [1, 2]. The three-qubit Toffoli gate, also called the controlled-controlled NOT, is an important operation in basic quantum error correction. We report a scheme for a Toffoli gate that exploits interactions with non-computational excited states of transmon qubits which can be executed faster than an equivalent construction using one- and two-qubit gates. The application of this gate to efficient measurement-free quantum error correction will be discussed. \\[4pt] [1] DiCarlo, et al. Nature 467, 574 (2010). \\[0pt] [2] Chow, et al. Phys. Rev. Lett. 102, 090502 (2009).

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Authors

  • Matthew Reed

    Department of Applied Physics and Physics, Yale University, New Haven, Connecticut 06520, USA

  • Leonardo DiCarlo

    Kavli Institute of Nanoscience, Delft University of Technology, Delft, The Netherlands

  • Luyan Sun

    Departments of Physics and Applied Physics, Yale University, Department of Applied Physics and Physics, Yale University, New Haven, Connecticut 06520, USA

  • Luigi Frunzio

    Yale University, Department of Applied Physics and Physics, Yale University, New Haven, Connecticut 06520, USA

  • Robert J. Schoelkopf

    Yale University, Department of Applied Physics and Physics, Yale University, New Haven, Connecticut 06520, USA