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QI: Fachverband Quanteninformation

QI 3: Certification and Benchmarking of Quantum Systems

QI 3.8: Talk

Monday, September 5, 2022, 17:15–17:30, H8

Break-even point of the quantum repetition code — Áron Rozgonyi and •Gábor Széchenyi — Eötvös University, Budapest

Repetition code is not a real quantum error correction code in the sense, that it cannot protect the logical information against any Pauli error. However, for simplicity repetition code is widely investigated theoretically and used for benchmarking state-of-the-art quantum devices. In our work, we analyze the efficiency of the phase-flip code as a quantum memory in presence of relaxation and dephasing. We take into account noisy two-qubit gates suffering from depolarizing and coherent error. We determine the parameter regime, where the repetition code performs better than an idle qubit.