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This research demonstrates that spin qubit systems can achieve fault-tolerant quantum computing even when physical qubit movement introduces dephasing errors up to five percent. By isolating these specific noise sources within surface code simulations, the study validates the viability of scalable architectures like SpinBus for future large-scale processors. The findings provide critical thresholds for hardware engineers designing conveyor-like qubit transport mechanisms without compromising error correction capabilities.
Surface code simulations map out qubit shuttling errors
Qubit shuttling may enable quantum computing platforms to reach qubit register sizes needed for effective quantum error correction, but also introduces additional errors that must be evaluated. Researchers used the Surface code and large scale simulations, introducing shuttling errors as an additional error location, to map out a two-dimensional parameter space and extract the threshold.
Researchers at RWTH Aachen University and Forschungszentrum Jülich have mapped out the impact of qubit movement on the performance of the surface code, a leading approach to quantum error correction. The team isolated errors introduced by physically moving qubits as a distinct source of noise within a standard circuit-level model, enabling a systematic investigation of their effects. Simulations using the SpinBus architecture revealed a threshold of several percent for dephasing errors during shuttling, suggesting that practical error correction remains viable even with relatively high error rates. The results demonstrate that spin qubit based quantum processors offer positive prospects as a viable avenue for scalable, fault-tolerant…
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