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Quantum Error Correction Below the Surface Code Threshold by Rajeev Acharya & Dmitry A. Abanin & Laleh Aghababaie-Beni & Igor Aleiner & Trond I. Andersen & Markus Ansmann & Frank Arute & Kunal Arya & Abraham Asfaw & Nikita Astrakhantsev & Juan Atalaya & Ryan Babbush & Dave Bacon & Brian Ballard & Joseph C.... is a book available to read on EtoBox.

What is Quantum Error Correction Below the Surface Code Threshold about?

Nature, doi:10.1038/s41586-024-08449-yQuantum error correction1–4 provides a path to reach practical quantum computing Published online: 9 December 2024by combining multiple physical qubits into a logical qubit, in which the logical error Open accessrate is suppressed exponentially as more qubits are added. However, this exponential suppression only occurs if the physical error rate is below a critical threshold. Here Check for updateswe present two below-threshold surface code memories on our newest generation of superconducting processors, Willow: a distance-7 code and a distance-5 code integrated with a real-time decoder. The logical error rate of our larger quantum memory is suppressed by a factor of Λ = 2.14 ± 0.02 when increasing the code distance by 2, culminating in a 101-qubit distance-7 code with 0.143% ± 0.003 per cent error per cycle of error correction. This logical memory is also beyond breakeven, exceeding the lifetime of its best physical qubit by a factor of 2.4 ± 0.3. Our system maintains below-threshold performance when decoding in real time, achieving an average decoder latency of 63 microseconds at distance 5 up to a million cycles, with a cycle time of 1.1 mic

Author

Rajeev Acharya & Dmitry A. Abanin & Laleh Aghababaie-Beni & Igor Aleiner & Trond I. Andersen & Markus Ansmann & Frank Arute & Kunal Arya & Abraham Asfaw & Nikita Astrakhantsev & Juan Atalaya & Ryan Babbush & Dave Bacon & Brian Ballard & Joseph C....

Publisher

x

Published

2025

Language

EN