Quantinuum Reports 99.9995% Logical Memory Fidelity on Helios

Quantinuum has reported a quantum error-correction result that brings a central requirement of useful quantum computing into sharper focus: keeping quantum information intact long enough to do something valuable with it. On its Helios trapped-ion computer, the company measured logical memory fidelity of 99.9995% per error-checking cycle—equivalent to about five logical failures per million cycles. Announced on October 19, the result represents a tenfold reduction from the company's previous...