Singapore's Million-Qubit Run Now Answers to the Auditors

SINGAPORE — The Singapore Institute's million-qubit processor, first run over the Q-Net backbone in September, has entered a quieter and more consequential phase: verification. Dr. Wei-Lin Tan said a team is now building independent checks that let an outside reviewer confirm a computation was performed correctly without re-running it — a problem she called "harder than the machine." Q-Net secures the channel carrying the results, she stressed, but does not certify the arithmetic inside the processor; the two must be proven separately. The stakes are practical. Institutions weighing quantum results for climate modeling and materials design cannot act on numbers they cannot audit. A graduate researcher, Amara Osei, described spending three weeks reconstructing a single verified output by hand. "The demonstration was one day," Tan said. "Making it something a stranger can believe is the year." The Institute expects to publish its verification framework before it accepts outside workloads.