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arXiv · 2304.11988

Graph-theoretical optimization of fusion-based graph state generation

Seok-Hyung Lee·Hyunseok Jeong
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Abstract

Graph states are versatile resources for various quantum information processing tasks, including measurement-based quantum computing and quantum repeaters. Although the type-II fusion gate enables all-optical generation of graph states by combining small graph states, its non-deterministic nature hinders the efficient generation of large graph states. In this work, we present a graph-theoretical strategy to effectively optimize fusion-based generation of any given graph state, along with a Python package OptGraphState. Our strategy comprises three stages: simplifying the target graph state, building a fusion network, and determining the order of fusions. Utilizing this proposed method, we evaluate the resource overheads of random graphs and various well-known graphs. Additionally, we investigate the success probability of graph state generation given a restricted number of available resource states. We expect that our strategy and software will assist researchers in developing and assessing experimentally viable schemes that use photonic graph states.

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Seok-Hyung Lee, Hyunseok Jeong. 2023-04-24. Graph-theoretical optimization of fusion-based graph state generation. https://doi.org/10.22331/q-2023-12-20-1212

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