Summary
Reports Clavina, a modular time-bin photonic processor combining a fully programmable Gaussian linear-optical unit with addressable inline-squeezing and measurement-induced Kerr modules. The experiment verified cluster-state correlations across 8,000 time bins, demonstrated a low-photon-number Kerr interaction, and generated approximate one-dimensional optical GKP states quasi-deterministically with real-time feedforward. The reported GKP state was not yet a full two-dimensional fault-tolerant grid state.