Efficient Assessment of Process Fidelity

• URL: http://arxiv.org/abs/2102.08101v3
• Date: Thu, 29 Apr 2021 11:22:43 GMT
• Title: Efficient Assessment of Process Fidelity
• Authors: Sean Greenaway, Fr\'ed\'eric Sauvage, Kiran E. Khosla and Florian Mintert
• Abstract summary: We find a faithful approximation to the quantum process fidelity that can be estimated experimentally with reduced effort. Its practical use is demonstrated with the optimisation of a three-qubit quantum gate on a commercially available quantum processor.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The accurate implementation of quantum gates is essential for the realisation of quantum algorithms and digital quantum simulations. This accuracy may be increased on noisy hardware through the variational optimisation of gates, however the experimental realisation of such a protocol is impeded by the large effort required to estimate the fidelity of an implemented gate. With a hierarchy of approximations we find a faithful approximation to the quantum process fidelity that can be estimated experimentally with reduced effort. Its practical use is demonstrated with the optimisation of a three-qubit quantum gate on a commercially available quantum processor.

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