Theoretical and Computational Chemistry

Predicting the future of excitation energy transfer in light-harvesting complex with artificial intelligence-based quantum dynamics



Exploring excitation energy transfer (EET) in light-harvesting complexes (LHCs) is essential for understanding the natural processes and design of highly-efficient photovoltaic devices. LHCs are open systems, where quantum effects may play a crucial role for almost perfect utilization of solar energy. Simulation of energy transfer with inclusion of quantum effects can be done within the framework of dissipative quantum dynamics (QD), which are computationally expensive. Thus, artificial intelligence (AI) offers itself as a tool for reducing the computational cost. We suggest AI-QD approach using AI to directly predict QD as a function of time and other parameters such as temperature, reorganization energy, etc., completely circumventing the need of recursive step-wise dynamics propagation in contrast to the traditional QD and alternative, recursive AI-based QD approaches. Our trajectory-learning AI-QD approach is able to predict the correct asymptotic behavior of QD at infinite time. We demonstrate AI-QD on seven-sites Fenna–Matthews–Olson (FMO) complex.

Version notes

In the revised version, along with the excitation energy transfer, we are also predicting the coherence in the FMO complex. In addition, we also show that our method can successfully extrapolate and interpolate.


Thumbnail image of CNN_FMO_Final-merged.pdf

Supplementary weblinks

Dral's Group
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