Classifying and diagnosing crosstalk in quantum information processors

Presenting Author: Kenneth Rudinger, Sandia National Laboratories
Contributing Author(s): Mohan Sarovar, Dylan Langharst, Tim Proctor, Kevin Young, Erik Nielsen, Robin Blume-Kohout

Quantum information processor technology continues to progress, as illustrated by the construction and operation of devices with as many as sixteen qubits. While high-fidelity one- and two-qubit operations have been exhibited on such devices, there are a variety of errors that must be further mitigated prior to executing quantum error correction or meaningful quantum algorithms. One such error source is that of crosstalk, the process by which one or more qubits is affected by the state of, or operations on, neighboring qubits. In this talk we present a comprehensive taxonomy of crosstalk, and provide architecture-agnostic methods for detecting and characterizing such noise processes. Using experimental data taken from superconducting qubit systems, we show these protocols can be used to successfully diagnose multiple forms of crosstalk. Sandia National Laboratories is a multimission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC., a wholly owned subsidiary of Honeywell International, Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525.

(Session 9b : Friday from 4:15pm-4:45pm)


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