Boosted fusion gates above the percolation threshold for scalable graph-state generation

• URL: http://arxiv.org/abs/2412.18882v1
• Date: Wed, 25 Dec 2024 11:47:17 GMT
• Title: Boosted fusion gates above the percolation threshold for scalable graph-state generation
• Abstract summary: Fusing small resource states into a larger, fully connected graph-state is essential for scalable photonic quantum computing.<n>Here, we successfully demonstrate a boosted fusion gate with a theoretical success probability of 75%.<n>We further demonstrate the effectiveness of the boosted fusion gate by fusing two Bell states with a fidelity of 67(2)%.
• Score: 5.901670698617418
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Fusing small resource states into a larger, fully connected graph-state is essential for scalable photonic quantum computing. Theoretical analysis reveals that this can only be achieved when the success probability of the fusion gate surpasses a specific percolation threshold of 58.98% by using three-photon GHZ states as resource states. However, such an implementation of a fusion gate has never been experimentally realized before. Here, we successfully demonstrate a boosted fusion gate with a theoretical success probability of 75%, using deterministically generated auxiliary states. The success probability is experimentally measured to be 71.0(7)%. We further demonstrate the effectiveness of the boosted fusion gate by fusing two Bell states with a fidelity of 67(2)%. Our work paves a crucial path toward scalable linear optical quantum computing.

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