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Simultaneous Gate Set Tomography

ORAL

Abstract

Crosstalk is a leading source of failure in multiqubit quantum information processors. It can arise from a wide range of disparate physical phenomena, and can introduce subtle correlations in the errors experienced by a device. Several hardware characterization protocols are able to detect the presence of crosstalk, but few provide sufficient information to distinguish various crosstalk errors from one another. In this talk we introduce simultaneous gate set tomography, a protocol for detailed characterization of crosstalk errors. We demonstrate our methods by performing tomographic reconstructions on a two-qubit trapped ion system and a three-qubit superconducting qubit system. The results are consistent with expectations from simple physical models of these devices, but we also identify a number additional, unanticipated forms of crosstalk. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525.

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Presenters

  • Kevin Young

    Quantum Performance Laboratory, Sandia National Laboratories, Sandia National Laboratories, Quantum Performance Lab, Sandia National Laboratories

Authors

  • Robin Blume-Kohout

    Quantum Performance Laboratory, Sandia National Laboratories, Quantum Performance Lab, Sandia National Laboratories, Sandia National Laboratories

  • Susan M Clark

    Sandia National Laboratories

  • Akel Hashim

    Univ of California – Berkeley, University of California, Berkeley, Quantum Nanoelectronics Lab, UC Berkeley, University of California - Berkeley

  • Craig Hogle

    Sandia National Laboratories

  • Daniel Lobser

    Sandia National Laboratories

  • Ravi K. Naik

    University of California, Berkeley, Univ of California – Berkeley, Physics, University of California, Berkeley, University of California Berkeley, Univ of California - Berkeley, Quantum Nanoelectronics Laboratory, Dept. of Physics, University of California, Berkeley, University of California - Berkeley

  • Timothy Proctor

    Sandia National Laboratories, Quantum Performance Laboratory, Sandia National Laboratories, Quantum Performance Lab, Sandia National Laboratories

  • Kenneth Rudinger

    Sandia National Laboratories, Quantum Performance Lab, Sandia National Laboratories, Quantum Performance Laboratory, Sandia National Laboratories

  • David Ivan Santiago

    Lawrence Berkeley National Laboratory, University of California, Berkeley, Lawrence Berkely National Laboratory, Quantum Nanoelectronics Laboratory, Dept. of Physics, University of California, Berkeley

  • Irfan Siddiqi

    Lawrence Berkeley National Laboratory, University of California, Berkeley, Univ of California - Berkeley, Univ of California – Berkeley, Quantum Nanoelectronics Lab, UC Berkeley, Physics, University of California, Berkeley, Quantum Nanoelectronics Laboratory, Dept. of Physics, University of California, Berkeley

  • Kevin Young

    Quantum Performance Laboratory, Sandia National Laboratories, Sandia National Laboratories, Quantum Performance Lab, Sandia National Laboratories