Hacker News Front Page · [Submitted on 15 Dec 2025] ·
Magic state cultivation on a superconducting quantum processor
El estudio demuestra experimentalmente la preparación de estados mágicos mediante cultivation en un procesador cuántico superconductor, incluida la transición a un código de superficie y un protocolo de medición tolerante a fallos para acotar la fidelidad. El método reduce el error por un factor de 40 y alcanza una fidelidad de estado de 0.9999(1), aunque conserva el 8 % de los intentos.
Fault-tolerant quantum computing requires a universal gate set, but the necessary non-Clifford gates represent a significant resource cost for most quantum error correction architectures. Magic state cultivation offers an efficient alternative to resource-intensive distillation protocols; however, testing the proposal's assumptions represents a challenging departure from quantum memory experiments. We present an experimental study of magic state cultivation on a superconducting quantum processor. We implement cultivation, including code-switching into a surface code, and develop a fault-tolerant measurement protocol to bound the magic state fidelity. Cultivation reduces the error by a factor of 40, with a state fidelity of 0.9999(1) (retaining 8% of attempts). Our results experimentally establish magic state cultivation as a viable solution to one of quantum computing's most significant challenges.