Day: October 19, 2026

Quantinuum’s Helios system has set a new logical fidelity record of 99.9995%, equal to five errors per million operations. The result is 10 times better than the company’s September demonstration and shows a factor-of-12 reduction in logical errors with each increase in code distance. Independent assessment from Sandia and comparisons to prior published work indicate the milestone goes beyond a single fidelity record.