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Vibration-assisted resonance in photosynthetic excitation-energy transfer

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Lovett_2014_PRA_Vibration.pdf (1.156Mb)
Date
14/07/2014
Author
Irish, E.K.
Gómez-Bombarelli, R.
Lovett, B.W.
Keywords
QC Physics
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Abstract
Understanding how the effectiveness of natural photosynthetic energy-harvesting systems arises from the interplay between quantum coherence and environmental noise represents a significant challenge for quantum theory. Recently it has begun to be appreciated that discrete molecular vibrational modes may play an important role in the dynamics of such systems. Here we present a microscopic mechanism by which intramolecular vibrations may be able to contribute to the efficiency and directionality of energy transfer. Excited vibrational states create resonant pathways through the system, supporting fast and efficient energy transport. Vibrational damping together with the natural downhill arrangement of molecular energy levels gives intrinsic directionality to the energy flow. Analytical and numerical results demonstrate a significant enhancement of the efficiency and directionality of energy transport that can be directly related to the existence of resonances between vibrational and excitonic levels.
Citation
Irish , E K , Gómez-Bombarelli , R & Lovett , B W 2014 , ' Vibration-assisted resonance in photosynthetic excitation-energy transfer ' , Physical Review. A, Atomic, molecular, and optical physics , vol. 90 , no. 1 . https://doi.org/10.1103/PhysRevA.90.012510
Publication
Physical Review. A, Atomic, molecular, and optical physics
Status
Peer reviewed
DOI
https://doi.org/10.1103/PhysRevA.90.012510
ISSN
1050-2947
Type
Journal article
Rights
© 2014 American Physical Society
Description
B.W.L. thanks the Royal Society for support from a University Research Fellowship. This work was funded by the Leverhulme Trust.
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/5422

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