High photon-loss threshold quantum computing using GHZ-state measurements

• URL: http://arxiv.org/abs/2308.04192v1
• Date: Tue, 8 Aug 2023 11:36:23 GMT
• Title: High photon-loss threshold quantum computing using GHZ-state measurements
• Authors: Brendan Pankovich, Angus Kan, Kwok Ho Wan, Maike Ostmann, Alex Neville, Srikrishna Omkar, Adel Sohbi and Kamil Br\'adler
• Abstract summary: We propose fault-tolerant architectures based on performing projective measurements on constant-sized, entangled resource states. We present linear-optical constructions of the architectures, where the GHZ-state measurements are encoded to suppress the errors induced by photon loss. We believe this result shows a resource-efficient path to achieving photonic fault-tolerant quantum computing.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: We propose fault-tolerant architectures based on performing projective measurements in the Greenberger-Horne-Zeilinger (GHZ) basis on constant-sized, entangled resource states. We present linear-optical constructions of the architectures, where the GHZ-state measurements are encoded to suppress the errors induced by photon loss and the probabilistic nature of linear optics. Simulations of our constructions demonstrate high single-photon loss thresholds compared to the state-of-the-art linear-optical architecture realized with encoded two-qubit fusion measurements performed on constant-sized resource states. We believe this result shows a resource-efficient path to achieving photonic fault-tolerant quantum computing.

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