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- W2897634667 abstract "Gates in error-prone quantum information processors are often modeled using sets of one- and two-qubit process matrices, the standard model of quantum errors. However, the results of quantum circuits on real processors often depend on additional external “context” variables. Such contexts may include the state of a spectator qubit, the time of data collection, or the temperature of control electronics. In this article, we demonstrate a suite of simple, widely applicable, and statistically rigorous methods for detecting context dependence in quantum-circuit experiments. They can be used on any data that comprise two or more “pools” of measurement results obtained by repeating the same set of quantum circuits in different contexts. These tools may be integrated seamlessly into standard quantum device characterization techniques, like randomized benchmarking or tomography. We experimentally demonstrate these methods by detecting and quantifying crosstalk and drift on the publicly accessible 16-qubit ibmqx3.Received 9 November 2018DOI:https://doi.org/10.1103/PhysRevX.9.021045Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.Published by the American Physical SocietyPhysics Subject Headings (PhySH)Research AreasQuantum benchmarkingQuantum computationQuantum gatesQuantum information processingQuantum tomographyQuantum Information" @default.
- W2897634667 created "2018-10-26" @default.
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- W2897634667 date "2019-06-03" @default.
- W2897634667 modified "2023-09-26" @default.
- W2897634667 title "Probing Context-Dependent Errors in Quantum Processors" @default.
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- W2897634667 doi "https://doi.org/10.1103/physrevx.9.021045" @default.
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