Phonon spectral function of the Holstein polaron

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dc.creatorLoos, J
dc.creatorHohenadler, M
dc.creatorAlvermann, A
dc.creatorFehske, H
dc.date2006-04-03
dc.date2006-05-31
dc.date.accessioned2026-07-07T07:05:13Z
dc.date.available2026-07-07T07:05:13Z
dc.descriptionThe phonon spectral function of the one-dimensional Holstein model is obtained within weak and strong-coupling approximations based on analytical self-energy calculations. The characteristic excitations found in the limit of small charge-carrier density are related to the known (electronic) spectral properties of Holstein polarons such as the polaron band dispersion. Particular emphasis is laid on the different physics occurring in the adiabatic and anti-adiabatic regimes, respectively. Comparison is made with a cluster approach exploiting exact numerical results on small systems to yield an approximation for the thermodynamic limit. This method, similar to cluster perturbation theory, confirms the analytical findings, and yields accurate results also in the intermediate-coupling regime.
dc.description15 pages, 2 figures; revised and extended version
dc.identifierhttps://arxiv.org/abs/cond-mat/0604040
dc.identifierhttp://arxiv.org/abs/cond-mat/0604040
dc.identifierJournal of Physics: Condensed Matter 18, 7299-7312 (2006)
dc.identifierdoi:10.1088/0953-8984/18/31/023
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/109591
dc.subjectStrongly Correlated Electrons
dc.titlePhonon spectral function of the Holstein polaron
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