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Ultrafast exciton dynamics in molecular systems

Brüggemann, Ben LU ; Tsivlin, D. and May, V. (2007) Workshop on Quanturm Dynamics of Complex Molecular Systems In Quantum Dynamics of Complex Molecular Systems p.31-55
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... (More)
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. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
Quantum Dynamics of Complex Molecular Systems
pages
31 - 55
publisher
Springer
conference name
Workshop on Quanturm Dynamics of Complex Molecular Systems
external identifiers
  • wos:000243744600002
  • scopus:59249092438
ISSN
0172-6218
ISBN
978-3-540-34460-5
DOI
10.1007/978-3-540-34460-5_2
language
English
LU publication?
yes
id
b8fc4d26-d8fc-4811-818d-a25d4960c901 (old id 1409783)
date added to LUP
2009-05-29 16:26:56
date last changed
2017-08-06 04:39:21
@inproceedings{b8fc4d26-d8fc-4811-818d-a25d4960c901,
  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.},
  author       = {Brüggemann, Ben and Tsivlin, D. and May, V.},
  booktitle    = {Quantum Dynamics of Complex Molecular Systems},
  isbn         = {978-3-540-34460-5},
  issn         = {0172-6218},
  language     = {eng},
  pages        = {31--55},
  publisher    = {Springer},
  title        = {Ultrafast exciton dynamics in molecular systems},
  url          = {http://dx.doi.org/10.1007/978-3-540-34460-5_2},
  year         = {2007},
}