Excitation dynamics of various light harvesting systems have been investigated with many theoretical methods including various non-Markovian descriptions of dissipative quantum dynamics. It is typically assumed that each excited state is coupled to an independent thermal environment, i.e., that fluctuations in different environments are uncorrelated. Here the assumption is dropped and the effect of correlated bath fluctuations on excitation transfer is investigated. Using the hierarchy equations of motion for dissipative quantum dynamics it is shown for models of the B850 bacteriochlorophylls of LH2 that correlated bath fluctuations have a significant effect on the LH2 → LH2 excitation transfer rate. It is also demonstrated that inclusion of static disorder is crucial for an accurate description of transfer dynamics.
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7 March 2011
Research Article|
March 02 2011
The effect of correlated bath fluctuations on exciton transfer
Johan Strümpfer;
Johan Strümpfer
1Center for Biophysics and Computational Biology and Beckman Institute,
University of Illinois at Urbana-Champaign
, Urbana, USA
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Klaus Schulten
Klaus Schulten
a)
1Center for Biophysics and Computational Biology and Beckman Institute,
University of Illinois at Urbana-Champaign
, Urbana, USA
2Department of Physics,
University of Illinois at Urbana-Champaign
, Urbana, USA
Search for other works by this author on:
Johan Strümpfer
1
Klaus Schulten
1,2,a)
1Center for Biophysics and Computational Biology and Beckman Institute,
University of Illinois at Urbana-Champaign
, Urbana, USA
2Department of Physics,
University of Illinois at Urbana-Champaign
, Urbana, USA
a)
Author to whom correspondence should be addressed. Electronic mail: [email protected].
J. Chem. Phys. 134, 095102 (2011)
Article history
Received:
November 01 2010
Accepted:
February 01 2011
Citation
Johan Strümpfer, Klaus Schulten; The effect of correlated bath fluctuations on exciton transfer. J. Chem. Phys. 7 March 2011; 134 (9): 095102. https://doi.org/10.1063/1.3557042
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