Measuring error rates of mid-circuit measurements

Hothem, Daniel; Hines, Jordan; Baldwin, Charles; Gresh, Dan; Blume-Kohout, Robin; Proctor, Timothy

doi:10.1038/s41467-025-60923-x

Measuring error rates of mid-circuit measurements

Journal Article · Tue Jul 01 00:00:00 EDT 2025 · Nature Communications

DOI:https://doi.org/10.1038/s41467-025-60923-x· OSTI ID:2583864

^[1]; Hines, Jordan ^[2]; ^[3]; Gresh, Dan ^[3]; ^[4]; ^[1]

Sandia National Laboratories (SNL-CA), Livermore, CA (United States)
University of California, Berkeley, CA (United States); Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Quantinuum, Broomfield, CO (United States)
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

High-fidelity mid-circuit measurements, which read out the state of specific qubits in a multiqubit processor without destroying them or disrupting their neighbors, are a critical component for useful quantum computing. They enable fault-tolerant quantum error correction, dynamic circuits, and other paths to solving classically intractable problems. But there are few methods to assess their performance comprehensively. In this work, we address this gap by introducing the first randomized benchmarking protocol that measures the rate at which mid-circuit measurements induce errors in many-qubit circuits. Using this protocol, we detect and eliminate previously undetected measurement-induced crosstalk in a 20-qubit trapped-ion quantum computer. Then, we use the same protocol to measure the rate of measurement-induced crosstalk error on a 27-qubit IBM Q processor, and quantify how much of that error is eliminated by dynamical decoupling.

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Laboratories (SNL-CA), Livermore, CA (United States); Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)

Grant/Contract Number:: NA0003525

OSTI ID:: 2583864

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 16; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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