High-fidelity multiphoton-entangled cluster state with solid-state quantum emitters in photonic nanostructures

We propose a complete architecture for deterministic generation of entangled states. Our approach utilizes periodic driving of a quantum-dot and an efficient light-matter interface enabled by a photonic crystal. We assess the quality of the photonic states produced from a real by including all intrinsic experimental imperfections. Importantly, the is robust against the nuclear spin bath dynamics due to a naturally-in refocussing method reminiscent to spin echo. We demonstrate the of producing Greenberger-Horne-Zeilinger and one-dimensional states with fidelities and generation rates exceeding those achieved conventional 'fusion' methods in current state-of-the-art experiments. The hardware constitutes a scalable and resource-efficient approach implementation of measurement-based quantum communication and.