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physics.chem-ph2022★ 11 cited
Cumulant methods for electron-phonon problems. II. The self-consistent cumulant expansion
Paul J. Robinson, Ian S. Dunn, David R. Reichman
In this work we present a self-consistent cumulant expansion (SC-CE) and investigate its accuracy for the one-dimensional Holstein model with and without phonon dispersion. We show…
physics.chem-ph2022
Cumulant methods for electron-phonon problems. I. Perturbative expansions
Paul J. Robinson, Ian S. Dunn, David R. Reichman
In this work we investigate the ability of the cumulant expansion (CE) to capture one-particle spectral information in electron-phonon coupled systems at both zero and finite tempe…