QuiX Quantum, a leading provider of photonic quantum computing hardware, today announced it has demonstrated “below threshold” error mitigation for the first time on a photonic quantum computer, suppressing physical qubit errors to the level compatible with scalable, fault-tolerant quantum computing. The achievement also marks the first time a European company has demonstrated a production-ready method of error reduction, demonstrating the scalability of the QuiX quantum computing platform based on photonics. The project was conducted on the QuiX Bia™ Cloud Quantum Computing Service in collaboration with NASA’s Quantum Artificial Intelligence Laboratory, the University of Twente, and Freie Universität Berlin. Quantum information is fragile, and without error correction, a computation of any user-relevant size will be impossible. For this reason, the ability to control errors in the quantum state is seen as a crucial milestone for any of the competing computing platforms. Increasingly, experts consider the ability to deal with such errors as the crucial differentiator between different technological approaches. For such a protocol to be meaningful, it must meet two conditions: it must remove more errors than it introduces, and it must not impede the operation of the rest of the computer. QuiX is the first party in photonics to demonstrate a protocol that meets both requirements simultaneously. The findings are described in a paper available at https://arxiv.org/abs/2601.05947 which is currently undergoing peer review. “Below-threshold, physical error mitigation has never been implemented in a photonic quantum computer. This achievement marks a significant milestone and places QuiX Quantum at the forefront of progress toward fault-tolerant photonic quantum computing,” said Stefan Hengesbach, CEO of QuiX Quantum. “We believe the most resource-efficient strategy is to reduce errors early rather than correct them at great expense – and by demonstrating net positive error mitigation on real hardware, we’ve taken a foundational step that showcases