Hein, Birgit and Kreisbeck, Christoph and Kramer, Tobias and Rodriguez, Mirta (2012) Modelling of oscillations in two-dimensional echo-spectra of the Fenna-Matthews-Olson complex. NEW JOURNAL OF PHYSICS, 14: 023018. ISSN 1367-2630,
Full text not available from this repository. (Request a copy)Abstract
Recent experimental observations of time-dependent beatings in the two-dimensional echo-spectra of light-harvesting complexes at ambient temperatures have opened up the question of whether coherence and wave-like behaviour play a significant role in photosynthesis. We carry out a numerical study of the absorption and echo-spectra of the Fenna-Matthews-Olson (FMO) complex in Chlorobium tepidum and analyse the requirements in the theoretical model needed to reproduce beatings in the calculated spectra. The energy transfer in the FMO pigment-protein complex is theoretically described by an exciton Hamiltonian coupled to a phonon bath which accounts for the pigments' electronic and vibrational excitations, respectively. We use the hierarchical equations of motions method to treat the strong couplings in a non-perturbative way. We show that the oscillations in the two-dimensional echo-spectra persist in the presence of thermal noise and static disorder.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | GREEN SULFUR BACTERIA; ENERGY-TRANSFER; EXCITATION-ENERGY; QUANTUM COHERENCE; FMO COMPLEX; PHYSIOLOGICAL TEMPERATURE; PHOTOSYNTHETIC COMPLEXES; ELECTRONIC SPECTROSCOPY; ANTENNA COMPLEXES; NOISE BATH; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Alumni or Retired Professors > Group Tobias Kramer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 20 May 2020 04:29 |
| Last Modified: | 20 May 2020 04:29 |
| URI: | https://pred.uni-regensburg.de/id/eprint/19238 |
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