Berlin 2024 – wissenschaftliches Programm
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QI: Fachverband Quanteninformation
QI 7: Quantum Error Correction
QI 7.6: Vortrag
Montag, 18. März 2024, 16:30–16:45, HFT-TA 441
Coherent errors in stabilizer codes caused by quasi-static phase damping — •David Pataki1, Aron Marton1, Janos Asboth1,2, and Andras Palyi1,3 — 1Department of Theoretical Physics, Institute of Physics, Budapest University of Technology and Economics, Muegyetem rkp. 3., H-1111 Budapest, Hungary — 2Wigner Research Centre for Physics, H-1525 Budapest, P.O. Box 49., Hungary — 3HUN-REN--BME Quantum Dynamics and Correlations Research Group, Muegyetem rkp. 3., H-1111 Budapest, Hungary
Quantum error correction is a key challenge for the development of practical quantum computers, a direction in which significant experimental progress has been made in recent years. In solid-state qubits, one of the leading information loss mechanisms is dephasing, usually modelled by phase flip errors.
In this talk, I will introduce quasi-static phase damping, a more subtle error model which describes the effect of Larmor frequency fluctuations due to 1/f noise. I will show how this model is different from a simple phase flip error model, in terms of repeated syndrome measurements.
Considering the surface code, I will provide numerical evidence for an error threshold, in the presence of quasi-static phase damping and readout errors. I will also discuss the implications of our results for spin qubits and superconducting qubits.
Keywords: Quantum Error Correction; surface code; coherent errors; spin qubits; superconducting qubits