Deterministic and Programmable Fusion for Scalable Generation of Photonic Graph States
A new arXiv preprint reports a deterministic and programmable fusion method for generating photonic graph states. It aims to produce large-scale multiphoton graph states with programmable connections, going beyond the limited instances previously demonstrated. The authors position the technique for use in measurement-based quantum computing and quantum repeaters without quantum memories.
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What this could mean
- 0–2 yearsPlausible
If the reported fusion operation works as described, it could allow photonic platforms to assemble graph states of dozens of photons within two years by replacing probabilistic fusion with deterministic gates.
Current photonic graph state generation is limited by probabilistic fusion, which imposes scaling overhead. A deterministic programmable fusion gate removes that bottleneck, but practical scaling still depends on integrating high-efficiency photon sources, low-loss waveguides, and fast detectors.
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