Long-Lived Electronic Coherence in Dissipative Exciton-Dynamics of Light-Harvesting Complexes
Abstract
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 a continuum of higher-frequency vibrations required for efficient transport and (ii) a small slope of the spectral density at zero frequency.
- Publication:
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arXiv e-prints
- Pub Date:
- March 2012
- DOI:
- 10.48550/arXiv.1203.1485
- arXiv:
- arXiv:1203.1485
- Bibcode:
- 2012arXiv1203.1485K
- Keywords:
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- Physics - Biological Physics;
- Physics - Chemical Physics;
- Quantum Physics
- E-Print:
- 7 pages