Article (Scientific journals)
Visualising the role of non-perturbative environment dynamics in the dissipative generation of coherent electronic motion
Chin, A.W.; Mangaud, E.; Chevet, V. et al.
2019In Chemical Physics, 525, p. 110392
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Keywords :
Excitation transfer; HEOM; non markovianity
Abstract :
[en] Targeted exciton transport is crucial for efficient light-harvesting, but its microscopic description in biological systems is complicated by strong environmental coupling, highly structured vibrational environments and non-Markovian open system dynamics. In this article we employ the non-perturbative hierarchical equations of motion (HEOM) technique to explore how structured environments and tuned electronic properties can lead to the generation of coherent motion across a directed transport network, i.e. one containing an energy gradient. By further exploiting the information contained in the auxiliary HEOM matrices, we also visualize the complete displacement distributions of the main reaction coordinate during the ultrafast relaxation, and show that highly non-Gaussian profiles emerge when the electronic dynamics become quasi-reversible and involve bath-induced delocalized states. These coherent dynamics are spontaneously generated by earlier incoherent relaxation events, and we also demonstrate the correlation between the environmental coordinates and a quantitative volume-based measure of non- Markovianity.
Disciplines :
Chemistry
Author, co-author :
Chin, A.W.;  Paris-Sorbonne
Mangaud, E.;  Université Paris-Sorbonne
Chevet, V.;  Paris-Sud
Atabek, O.
Desouter, Michèle ;  Université de Liège - ULiège > Département de chimie (sciences) > Département de chimie (sciences)
Language :
English
Title :
Visualising the role of non-perturbative environment dynamics in the dissipative generation of coherent electronic motion
Publication date :
2019
Journal title :
Chemical Physics
ISSN :
0301-0104
Publisher :
Elsevier, Netherlands
Volume :
525
Pages :
110392
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
Bourse D'Alembert paris Saclay
Available on ORBi :
since 11 June 2019

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