Five Days On, The Million-Qubit Machine Faces Its Second Question

SINGAPORE — When the Singapore Institute ran a million-qubit processor across the Q-Net backbone on the fourteenth, the headline was the scale. Five days later, the working question in the labs is quieter and harder: verification. A machine that outruns every classical checker also outruns anyone's ability to confirm its answer by hand, and Dr. Wei-Lin Tan, the physicist who narrated the demonstration, was careful this week to separate the two. "We showed the qubits can be held and linked at that number," she said. "We did not show, and would not claim, that the field yet knows how to certify every result such a machine returns." Q-Net secured the channel between processor and observers — it moved no information faster than light, only guaranteed the line was unread. The distinction matters: the institute's own follow-up notes flag error-correction overhead as the real frontier now. The million-qubit threshold is crossed. Whether crossing it means we can believe the machine is the next decade's work, not this week's.