A hybrid quantum-classical method for electron-phonon systems
A hybrid quantum-classical method for electron-phonon systems
复制标题
电子声子系统的混合量子经典方法
DOI:
10.1038/s42005-023-01353-3
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发表时间:
2023
影响因子:
5.5
通讯作者:
Wang, Yao
中科院分区:
文献类型:
--
作者:
Denner, M. Michael;Miessen, Alexander;Yan, Haoran;Tavernelli, Ivano;Neupert, Titus;Demler, Eugene;Wang, Yao
Interactions between electrons and phonons play a crucial role in quantum materials. Yet, there is no universal method that would simultaneously accurately account for strong electron-phonon interactions and electronic correlations. By combining methods of the variational quantum eigensolver and the variational non-Gaussian solver, we develop a hybrid quantum-classical algorithm suitable for this type of correlated systems. This hybrid method tackles systems with arbitrarily strong electron-phonon coupling without increasing the number of required qubits and quantum gates, as compared to purely electronic models. We benchmark our method by applying it to the paradigmatic Hubbard-Holstein model at half filling, and show that it correctly captures the competition between charge density wave and antiferromagnetic phases, quantitatively consistent with exact diagonalization.
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