Researchers present Clavina, an extensible photonic quantum computing architecture that overcomes the long-standing limitation of photonic systems to linear operations. By combining a fully programmable, scalable linear-optical network with two plug-and-play nonlinear modules — an inline squeezer and a Kerr interaction module — the platform achieves a universal physical gate set. Key demonstrations include quasi-deterministic generation of optical Gottesman–Kitaev–Preskill (GKP) states (previously only probabilistic), generation of large-scale continuous-variable cluster states across 8,000 time bins, and simulation of the Bose–Hubbard many-body model beyond the hard-core boson limit. The modular, time-bin-multiplexed design is inspired by CPU architecture and is compatible with future integrated photonic chips, positioning it as a viable route toward fault-tolerant photonic quantum computing.
