Author

X. C. Kolesnikow

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Preprint Oct 2026

Entangled logical qubits on a superconducting quantum processor

We demonstrate high-fidelity logical qubit operations using \texttt{ibm\_phoenix}, a square-lattice array of 120 coupled superconducting qubits that are capable of fast reset. Using strategies to exclude underperforming components together with noise informed decoding, we routinely produce surface codes at distance-3 a...

Robin Harper, X. C. Kolesnikow, Campbell K. McLauchlan et al. · 0 citations

Preprint Oct 2026

Error-Corrected Memory and Logic on a Heavy-Hex Superconducting-Qubit Processor

Large quantum computations require high-fidelity error-corrected memory and fault-tolerant logical operations. To achieve these with superconducting circuits, quantum processors will need many components operating with low error rates. In practice, fabrication of monolithic superconducting devices produces unavoidable...

Campbell K. McLauchlan, Georgia M. Nixon, Julien M. Drouet et al. · 0 citations