期刊
QUANTUM SCIENCE AND TECHNOLOGY
卷 5, 期 3, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2058-9565/ab972b
关键词
hybrid quantum-classical algorithms; variational quantum algorithms; two-site DMFT; dynamical mean-field theory; quantum computing; quantum chemistry; NISQ
资金
- EPSRC National Quantum Technology Hub in Networked Quantum Information Technology [EP/M013243/1]
- EPSRC Hub in Quantum Computing and Simulation [EP/T001062/1]
- National Research Foundation, Prime Ministers Office, Singapore
- Ministry of Education, Singapore, under the Research Centres of Excellence program
- EPSRC [EP/T001062/1, EP/M013243/1] Funding Source: UKRI
We numerically emulate noisy intermediate-scale quantum (NISQ) devices and determine the minimal hardware requirements for two-site hybrid quantum-classical dynamical mean-field theory (DMFT). We develop a circuit recompilation algorithm which significantly reduces the number of quantum gates of the DMFT algorithm and find that the quantum-classical algorithm converges if the two-qubit gate fidelities are larger than 99%. The converged results agree with the exact solution within 10%, and perfect agreement within noise-induced error margins can be obtained for two-qubit gate fidelities exceeding 99.9%. By comparison, the quantum-classical algorithm without circuit recompilation requires a two-qubit gate fidelity of at least 99.999% to achieve perfect agreement with the exact solution. We thus find quantum-classical DMFT calculations can be run on the next generation of NISQ devices if combined with the recompilation techniques developed in this work.
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