SAMOP 2021 – wissenschaftliches Programm
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QI: Fachverband Quanteninformation
QI 6: Quantum Computing and Algorithms II
QI 6.5: Vortrag
Mittwoch, 22. September 2021, 12:15–12:30, H3
Cheap Readout Error Mitigation on Expensive NISQ devices — •Ákos Budai1, 2, 3, András Pályi1, 3, and Zoltán Zimborás2, 3 — 1Department of Theoretical Physics and MTA-BME Exotic Quantum Phases Research Group, Budapest University of Technology and Economics, Hungary — 2Wigner RCP, Hungarian Academy of Sciences — 3Nokia Bell Labs, (Budapest, Hungary)
Noisy Intermediate-Scale Quantum (NISQ) devices are already available today for public use. These prototype quantum processors do not have enough qubits needed for implementing useful quantum error correction codes. Instead, different error mitigation schemes turned out to be efficient tools for improving the functionality of NISQ devices. In most superconducting prototype quantum computers, the readout error dominates the errors of individual gates. The level of improvement gained by readout error mitigation (REM) depends on the error probabilities and number of shots available. In this work, we quantify the efficiency of REM for a specific simple quantum protocol (parameter estimation), and combine analytical and numerical techniques to find the optimal division of available shots between the REM task and the quantum protocol itself. This task is of direct financial relevance, since certain quantum computer providers bill after the number of shots executed.