IonQ (NYSE: IONQ) announced it has demonstrated what it claims is the first end-to-end real-time quantum error correction decoder that runs on a single standard central processing unit, according to a company press release.

The company said its decoder addressed a processing bottleneck in fault-tolerant quantum computing, where classical computers tasked with identifying and correcting errors can slow or pause quantum system execution. IonQ's approach allows a single off-the-shelf CPU to manage the decoding workload continuously without interrupting quantum operations.

Technical research published on arXiv details that IonQ tested its dual-decoder architecture on benchmark circuits simulating up to 408 logical qubits across 88 memory blocks and magic factories, executing more than 31.5 million individual quantum operations. Under standard operational noise, the decoder introduced as little as 0.02% added processing time.

"Successfully validating real-time decoding across hundreds of logical qubits and over millions of logical operations is an important milestone. Moreover, the fact that our decoder runs on a single CPU provides a practical path to commercial-scale fault-tolerant quantum computing," said Nicolas Delfosse, paper co-author and quantum research lead at IonQ.

IonQ said the result validates a component of its Walking Cat architecture and supports the company's stated roadmap of scaling beyond 256 physical qubits toward systems controlling thousands of qubits. The company added that classical hardware overhead does not need to scale exponentially as quantum systems grow in logical qubits or operational depth.

"IonQ is enabling cost-effective quantum system scaling through direct verification of each component," said John Gamble, Vice President at IonQ Architecture.