Ultrafast exciton dynamics in molecular systems

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

Abstract

The theory of subpicosecond Frenkel exciton dynamics in molecular systems is reviewed with emphasis on a stepwise imp loved description of the coupling to intra- and intermolecular vibrations. After introducing the concept of multiexciton states the motion of electronic Frenkel excitons as they appear in light harvesting antennae of photosynthetic organisms is discussed. The description is based on a multiexciton density matrix theory which accounts for the exciton-vibrational coupling in a perturbative manner. Some improvements of this density matrix theory as suggested in literature are shortly mentioned. Afterwards, vibrational Frenkel excitons as found in polypeptides are considered. By utilizing the multiconfiguration time-dependent Hartree method an exact description of the coupling to longitudinal vibrations of the peptide chain becomes possible. The discussion of the computed transient infrared absorption spectra is supported by the introduction of adiabatic single- and two-exciton states.

Details

Authors
  • Ben Brüggemann
  • D. Tsivlin
  • V. May
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Atom and Molecular Physics and Optics
Original languageEnglish
Title of host publicationQuantum Dynamics of Complex Molecular Systems
PublisherSpringer
Pages31-55
ISBN (Print)978-3-540-34460-5
Publication statusPublished - 2007
Publication categoryResearch
Peer-reviewedYes
EventWorkshop on Quanturm Dynamics of Complex Molecular Systems - Paris, France
Duration: 0001 Jan 2 → …

Publication series

Name
ISSN (Print)0172-6218

Conference

ConferenceWorkshop on Quanturm Dynamics of Complex Molecular Systems
CountryFrance
CityParis
Period0001/01/02 → …

Bibliographic note

The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Chemical Physics (S) (011001060)