Many-polaron problem by cluster perturbation theory
Martin Hohenadler, Gerhard Wellein, Andreas Alvermann, Holger Fehske
TL;DR
This paper investigates how the photoemission spectrum of the Holstein many-polaron model varies with carrier density, using advanced computational methods to improve the accuracy of spectral predictions.
Contribution
It introduces an improved cluster diagonalization technique with Chebyshev expansion for studying the many-polaron problem.
Findings
Carrier-density significantly affects the photoemission spectrum.
Enhanced computational approach yields more accurate spectral results.
Method can be applied to other strongly correlated electron-phonon systems.
Abstract
The carrier-density dependence of the photoemission spectrum of the Holstein many-polaron model is studied using cluster perturbation theory combined with an improved cluster diagonalization by Chebychev expansion.
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