Real-time quantum error correction beyond break-even (original) (raw)

The ambition of harnessing quantum computation is challenged by decoherence, which undermines the integrity of quantum information. Quantum error correction (QEC) aims to mitigate this effect but has previously struggled to extend coherence effectively due to excessive error rates. This work presents a fully stabilized and error-corrected logical qubit utilizing the Gottesman-Kitaev-Preskill (GKP) encoding, achieving a coherence gain of G = 2.27 ± 0.07, surpassing the break-even point. The study demonstrates the effectiveness of a hybrid QEC system that leverages innovations in superconducting circuits and reinforcement learning to adaptively manage errors, paving the way for next-generation quantum information systems.