Cumulant expansion in the independent-particle approximation accurately calculates charge mobility for weak to moderate electron-phonon coupling in Peierls and Fröhlich models, as validated against Boltzmann and Migdal approaches.
SPECTRAL FUNCTIONS IN THE FR ¨OHLICH MODEL In the main text, the results for the Fr¨ ohlich model were presented in Sec
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Applicability of the cumulant expansion method for the calculation of transport properties in electron-phonon systems
Cumulant expansion in the independent-particle approximation accurately calculates charge mobility for weak to moderate electron-phonon coupling in Peierls and Fröhlich models, as validated against Boltzmann and Migdal approaches.