## Title data

Axt, Vollrath M. ; Mukamel, Shaul:

**Influence of a phonon bath on electronic correlations and optical response in molecular aggregates.**

*In:* Moloney, Jerome V.
(ed.):
Nonlinear Optical Materials. -
Berlin ; New York
: Springer
,
1998
. - pp. 1-32
. - (IMA Volumes in Mathematics and Its Applications
; 101
)

ISBN 0-387-98581-6

DOI: https://doi.org/10.1007/978-1-4612-1714-5_1

## Related URLs

## Project information

Project financing: |
Deutsche Forschungsgemeinschaft National Science Foundation and the US Air Force oﬃce of scientiﬁc research |
---|

## Abstract in another language

A generating function algorithm that allows the calculation of the optical response of coupled exciton-phonon systems is developed. For a model of assemblies of three-level molecules coupled via dipole interaction and interacting linearly with nuclear degrees of freedom, we derive a closed set of equations of motion for ﬁve generating functions representing the exact response to third order in the external ﬁeld. These are equivalent to an inﬁnite hierarchy of equations of motion for phonon-assisted variables. Starting with the equations for the generating functions, several reduction schemes are derived. By eliminating the phonon degrees of freedom in favor of self-energies, the Haken-Strobl model of relaxation is recovered as a limiting case. A set of time-local equations is presented extending the Haken-Strobl treatment by keeping the temperature dependence as well as the excitonic signatures of the phonon self-energies. Finally, we derive equations that interpolate between the coherent and incoherent limits of exciton propagation and properly include the two exciton dynamics.

## Further data

Item Type: | Article in a book |
---|---|

Refereed: | Yes |

Keywords: | generating functions; phonons; molecular aggregates; ultrafast dynamics; Frenkel-excitons; nonlinear optics |

Institutions of the University: | Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III > Chair Theoretical Physics III - Univ.-Prof. Dr. Martin Axt Faculties Faculties > Faculty of Mathematics, Physics und Computer Science Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III |

Result of work at the UBT: | No |

DDC Subjects: | 500 Science > 530 Physics |

Date Deposited: | 17 Oct 2017 08:18 |

Last Modified: | 17 Oct 2017 08:18 |

URI: | https://eref.uni-bayreuth.de/id/eprint/40024 |