Three quantum operations land on one factory chip
On 16 September 2026 the French company Quobly reported qubit readout, single-qubit gates, and two-qubit gates on one silicon-spin chip built in its QSOI process at STMicroelectronics' commercial 300-millimeter fab in Crolles, using fully depleted silicon-on-insulator technology. The company calls this an early check that those operations can be done on devices from an industrial line, and says detailed performance numbers will come in a later scientific paper. It also describes a cryogenic design kit and co-integration of quantum and cold control circuits. A first cloud system is planned by the end of 2026, and a million-qubit target is stated for 2032. Those later figures are plans, not results.
The record ends here. Everything below this line is invented.
What if a quantum chip was just another die on a factory wafer?
Part one
The Third Operation
Rafi's wafer was a dinner plate of identical promises. The line that had always made ordinary transistors had, on this lot, left a few dies that could read a spin, turn it, and turn it together with a neighbor. Three operations, one chip, the note that let the lot leave the fab.
He was not asked to publish a fidelity. The paper would come later. He was asked to say whether the next die, two centimeters over, did the same three things. Repeatability was the whole point of using the big line.
The second die read out. It turned one spin. On the two-spin step the trace stayed flat, a neighbor that would not couple.
The lot ticket already had a green mark from the first die. The truck for the cryogenic test lab left at four.
Rafi held the stamp over the green mark and did not bring it down.
What’s real
- Readout, single-qubit, and two-qubit gates were shown on one chip
- The chip came from a commercial 300-millimeter process
- Performance numbers were deferred to a later paper
- Million-qubit and cloud dates in the note are plans
What’s invented
- Rafi's second die that will not couple
- A green lot mark based on the first die
- A truck at four and a stamp in his hand
- A factory rule that one good die speaks for the wafer
Part two: The Die Beside the Good One
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Filed under physics, silicon spin qubits, semiconductors, manufacturing.