Multi-qubit correlated quasiparticle transitions in large array of tantalum transmon qubits: Part I
ORAL
Abstract
Quantum error correction is a crucial aspect in realizing a universal quantum computer. Ensuring errors are uncorrelated in both space and time is a significant requirement. However, recent studies have revealed correlated errors, such as charge noise, two-level-system drift, and energy relaxation in superconducting qubits, induced by cosmic rays. This work focuses on observing correlated errors related to quasiparticle transitions in a large array of tantalum transmon qubits. The results demonstrate that multi-qubit correlated quasiparticle transition events are more frequent than multi-qubit correlated energy relaxation events, affirming their association with quasiparticle bursts. Interestingly, the average rate of multi-qubit correlated energy relaxation events in tantalum qubits was found to be smaller than that in aluminum qubits, possibly attributed to the stronger electron-phonon interaction in tantalum. Part I of the presentation emphasizes the experimental design, setup, and calibration.
*This work is supported by the National Natural Science Foundation of China (NSFC) and the Natural Science Foundation of Beijing (NSFB), Grants No. are NSFC-11890704, NSFB-Z190012, NSFC-12174126, NSFC-12104055, NSFC-12004042, NSFC-12104056.
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Presenters
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Xuegang Li
- Beijing Academy of Quantum Information Sciences