Tailoring fusion-based photonic quantum computing schemes to quantum emitters

Abstract

Fusion-based quantum computation is a promising quantum computing model where small-sized photonic resource states are simultaneously entangled and measured by fusion gates. Such operations can be readily implemented with scalable photonic hardware: resource states can be deterministically generated by quantum emitters and fusions require only shallow linear-optical circuits. Here, we propose fusion-based architectures tailored to the capabilities and noise models in quantum emitters. We show that high tolerance to dominant physical error mechanisms can be achieved, with fault-tolerance thresholds of 8% for photon loss, 4% for photon distinguishability between emitters, and spin noise thresholds well above memory-induced errors for typical spin-photon interfaces. Our construction and analysis provide guidelines for the development of photonic quantum hardware targeting fault-tolerant applications with quantum emitters.

Added proofs in Supplementary. Published version with high resolution figs

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• Deterministic and reconfigurable graph state generation with a single solid-state quantum emitter
• Minimizing resource overhead in fusion-based quantum computation using hybrid spin-photon devices
• Quantum resource estimates for computing binary elliptic curve discrete logarithms
• Heralded photonic graph states with inefficient quantum emitters
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