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Title: Förster resonance energy transfer, absorption and emission spectra in multichromophoric systems. III. Exact stochastic path integral evaluation

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.4908601· OSTI ID:22416205
; ;  [1]
  1. Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139 (United States)

A numerically exact path integral treatment of the absorption and emission spectra of open quantum systems is presented that requires only the straightforward solution of a stochastic differential equation. The approach converges rapidly enabling the calculation of spectra of large excitonic systems across the complete range of system parameters and for arbitrary bath spectral densities. With the numerically exact absorption and emission operators, one can also immediately compute energy transfer rates using the multi-chromophoric Förster resonant energy transfer formalism. Benchmark calculations on the emission spectra of two level systems are presented demonstrating the efficacy of the stochastic approach. This is followed by calculations of the energy transfer rates between two weakly coupled dimer systems as a function of temperature and system-bath coupling strength. It is shown that the recently developed hybrid cumulant expansion (see Paper II) is the only perturbative method capable of generating uniformly reliable energy transfer rates and emission spectra across a broad range of system parameters.

OSTI ID:
22416205
Journal Information:
Journal of Chemical Physics, Vol. 142, Issue 9; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-9606
Country of Publication:
United States
Language:
English

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How two-dimensional brick layer J-aggregates differ from linear ones: Excitonic properties and line broadening mechanisms journal April 2016
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Initial System-Environment Correlations via the Transfer Tensor Method text January 2017
Theory for polariton-assisted remote energy transfer preprint January 2017
Optimal Energy Transfer in Light-Harvesting Systems journal August 2015
Generalised Marcus Theory for Multi-Molecular Delocalised Charge Transfer text January 2017
Coherent and incoherent theories for photosynthetic energy transfer text January 2019