Pasqal has achieved a breakthrough: qubit control has been transferred to a photonic chip for the first time.
French company Pasqal has presented a result that could change the rules of the game in quantum computing. For the first time in the history of neutral-atom systems, qubit control was achieved using laser light generated and directed directly on a photonic integrated circuit. This is not just an experiment—it is a step toward radically simplifying the architecture of quantum processors.
The essence of the technology: optics go "onboard"
At the core of neutral-atom quantum computers are optical tweezers—focused laser beams that capture and move individual atoms acting as qubits. Traditionally, this system is bulky: external optical components take up significant space and complicate scaling as the number of atoms grows. Pasqal has solved this problem by integrating a key part of the optics directly onto the chip.
During the demonstration, a single photonic chip formed four independently controlled optical traps, in which four rubidium atoms were successfully held. The lifetime of the trapped atoms was about 27.5 seconds—a figure comparable to the performance of the traditional optical system used by the company. This is a critically important result, as it confirms the practical viability of the chip-based architecture.
From four atoms to thousands: the path to fault tolerance
Four atoms are merely a proof of concept, but it is precisely the optical infrastructure that becomes the main bottleneck in scaling neutral-atom technology. Pasqal aims to create systems with more than 10,000 atoms and 100 logical qubits, and integrated photonics here is seen as a key solution. This approach allows for a sharp reduction in the complexity of the optical part and makes the production of quantum processors more manufacturable and scalable.
The development of the photonic chip became possible thanks to the acquisition of subsidiary company Aeponyx in 2025, which specializes in photonic circuit integration. This acquisition was a strategic step to accelerate the transition to fault-tolerant computing.
It is worth recalling that Pasqal already has experience in practical implementation: in partnership with Saudi Aramco, the company launched the first quantum computer in Saudi Arabia.
My view: This breakthrough is not just a technical detail, but a signal of a paradigm shift. If integrated photonics becomes the standard, we will see not only accelerated scaling but also a reduction in the cost of quantum systems, bringing their commercial use closer. Pasqal is clearly playing ahead of the curve, and this is worth watching.