Pasqal traps four atoms with a photonic chip, calling it a first on the path to scaled quantum hardware

Pasqal has moved the room-filling laser bench that drives its neutral-atom quantum computer onto a fingernail-sized chip. On August 10, the French neutral-atom company said a silicon-nitride photonic integrated circuit (PIC), the same kind of light-routing hardware used in telecom and lidar, trapped four individual rubidium atoms in four independently addressable optical traps, a step it framed as a world first (Pasqal newsroom).

Four atoms sit in a single trap array, not a multi-array processor, so the demonstration is small. Pasqal measured atom lifetime at about 27.5 seconds, which the company says matches its existing bulk-optics platforms. The architectural bet is that shrinking the optical bench, the racks of lenses, mirrors, and modulators that steer each atom's trapping beam, is what unblocks scaling, because that complexity grows with qubit count.

Pasqal estimates the new platform can cut the optical footprint of future processors by roughly 50x (The Qubit Report). The chip itself came from Aeponyx, a silicon-nitride photonics firm Pasqal acquired in 2024 (HPCwire). The company's roadmap target of more than 10,000 atoms and 100 logical qubits remains a goal, not a delivered result, and the four-atom prototype does not speak to fault-tolerance.