Long-Lived Electronic Coherence in Dissipative Exciton-Dynamics of Light-Harvesting Complexes

Details Long-Lived Electronic Coherence in Dissipative Exciton-Dynamics of Light-Harvesting Complexes Long-Lived Electronic Coherence in Dissipative Exciton-Dynamics of Light-Harvesting Complexes

2012-03-06

arxiv.org/abs/1203.1485v1

Physics

Biological Physics

5 pages

Scientific paper

The observed prevalence of oscillatory signals in the spectroscopy of biological light-harvesting complexes at ambient temperatures has led to a search for mechanisms supporting coherent transport through larger molecules in noisy environments. We demonstrate a generic mechanism supporting long-lasting electronic coherence up to 0.3 ps at a temperature of 277 K. The mechanism relies on two properties of the spectral density: (i) a large dissipative coupling to higher vibronic modes required for efficient transport and (ii) a slow onset of the spectral density for small frequencies.

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