SAMOP 2023 – wissenschaftliches Programm

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QI: Fachverband Quanteninformation

QI 35: Quantum Computers: Algorithms and Benchmarking

QI 35.7: Vortrag

Freitag, 10. März 2023, 12:30–12:45, B305

Characterizing crosstalk of superconducting transmon processors — •Andreas Ketterer and Thomas Wellens — Fraunhofer Institut für Angewandte Festkörperphysik IAF, Tullastr. 72, 79108 Freiburg, Germany

Currently available quantum computing hardware based on superconducting transmon architectures realizes networks of hundreds of qubits with the possibility of controlled nearest-neighbor interactions. However, the inherent noise and decoherence effects of such quantum chips considerably alter basic gate operations and lead to imperfect outputs of the targeted quantum computation. In this talk we focus on the characterization of crosstalk effects which manifest themselves in correlations between simultaneously executed quantum gates on neighboring qubits. After a short explanation of the origin of such correlations we show how to efficiently and systematically characterize the magnitude of such crosstalk effects on an entire quantum chip using the randomized benchmarking protocol. In particular, we demonstrate the introduced protocol by running it on real quantum hardware provided by IBM. Lastly, we use the gained information in order to propose novel and more accurate means to simulate noisy quantum hardware by devising an appropriate crosstalk-aware noise model.