A Month On, Singapore's Million-Qubit Machine Is Still Just Running

SINGAPORE — The applause faded weeks ago. What remains is the machine itself, still cold, still cycling, four weeks after the Singapore Institute first ran a million-qubit processor across the Q-Net backbone on 14 September. Endurance, not the headline number, is the metric physicists now watch. "One clean demonstration proves the physics; a month of uptime proves you can build on it," said Dr. Wei-Lin Tan, the Institute physicist who has spent the interval fielding calls from labs that want time on the device. Q-Net, she is careful to repeat, secures the channel — it does not carry information faster than light, a distinction lost in much of the coverage. The queue for access now stretches past a hundred groups, most modeling materials and climate chemistry rather than codebreaking. For the graduate students running the overnight shifts in Singapore, the miracle has become a duty roster. The frontier, it turns out, is mostly a matter of not turning the thing off.