IONQ says it has developed a quantum error-correction decoder capable of running in real time on a single conventional CPU. The company says the approach could reduce the classical computing overhead that can delay larger fault-tolerant quantum systems. In simulations covering up to 408 logical qubits across 88 memory blocks and “magic factories”, the decoder added as little as 0.02% processing time under standard operating noise.
Quantum error correction uses additional physical qubits to detect and correct faults affecting more fragile logical qubits. As quantum systems grow, processing the information from those physical qubits can become a bottleneck, adding delay and increasing hardware demands. IonQ’s research, published on arXiv, claims its end-to-end decoder maintained real-time performance across hundreds of logical qubits and millions of logical operations.
Nicolas Delfosse, IonQ’s quantum research lead, described the single-CPU implementation as a potential path towards commercial-scale fault-tolerant quantum computing. The results are simulations and represent IonQ’s claims about its decoder; the article does not report deployment on a functioning large-scale quantum computer.