Geometrical effects on energy transfer in disordered open quantum systems
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Lloyd_Geometrical effects.pdf
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Author(s)
Shabani, A.
Omar, Yasser
Rabitz, H.
Mohseni, Masoud
Lloyd, Seth
Date Issued
May 2013
Journal
The Journal of Chemical Physics
Publisher
American Institute of Physics (AIP)
Citation
Mohseni, M., A. Shabani, S. Lloyd, Y. Omar, and H. Rabitz. “Geometrical Effects on Energy Transfer in Disordered Open Quantum Systems.” The Journal of Chemical Physics 138, no. 20 (2013): 204309.
Version
Final published version
Abstract
We explore various design principles for efficient excitation energy transport in complex quantum systems. We investigate energy transfer efficiency in randomly disordered geometries consisting of up to 20 chromophores to explore spatial and spectral properties of small natural/artificial Light-Harvesting Complexes (LHC). We find significant statistical correlations among highly efficient random structures with respect to ground state properties, excitonic energy gaps, multichromophoric spatial connectivity, and path strengths. These correlations can even exist beyond the optimal regime of environment-assisted quantum transport. For random configurations embedded in spatial dimensions of 30 Å or 50 Å, we observe that the transport efficiency saturates to its maximum value if the systems contain around 7 or 14 chromophores, respectively. Remarkably, these optimum values coincide with the number of chlorophylls in the Fenna-Matthews-Olson protein complex and LHC II monomers, respectively, suggesting a potential natural optimization with respect to chromophoric density.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Massachusetts Institute of Technology. Research Laboratory of Electronics
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Creative Commons Attribution 3.0 Unported Licence
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DOI of Published Version
https://doi.org/10.1063/1.4807084
