Quantum computing for the Lipkin model with unitary coupled cluster and structure learning ansatz

Abstract We report a benchmark calculation for the Lipkin model in nuclear physics with a variational quantum eigensolver in quantum computing. Special attention is paid to the unitary coupled cluster (UCC) ansatz and structure learning (SL) ansatz for the trial wave function. Calculations with both...

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Bibliographic Details
Published in:Chinese physics C 2022-02, Vol.46 (2), p.24106
Main Authors: Chikaoka, Asahi, Liang, Haozhao
Format: Article
Language:English
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Summary:Abstract We report a benchmark calculation for the Lipkin model in nuclear physics with a variational quantum eigensolver in quantum computing. Special attention is paid to the unitary coupled cluster (UCC) ansatz and structure learning (SL) ansatz for the trial wave function. Calculations with both the UCC and SL ansatz can reproduce the ground-state energy well; however, it is found that the calculation with the SL ansatz performs better than that with the UCC ansatz, and the SL ansatz has even fewer quantum gates than the UCC ansatz.
ISSN:1674-1137
2058-6132
DOI:10.1088/1674-1137/ac380a