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.
Jankovi´ c, Numerical investigation of transport prop- erties of the one-dimensional Peierls model based on the hierarchical equations of motion [Data set], Zenodo (2025)
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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.