  The theoretical and experimental study of energy transfer in photosynthesis
has revealed an interesting transport regime, which lies at the borderline
between classical transport dynamics and quantum-mechanical interference
effects. Dissipation is caused by the coupling of electronic degrees of freedom
to vibrational modes and leads to a directional energy transfer from the
antenna complex to the target reaction-center. The dissipative driving is
robust and does not rely on fine-tuning of specific vibrational modes. For the
parameter regime encountered in the biological systems new theoretical tools
are required to directly compare theoretical results with experimental
spectroscopy data. The calculations require to utilize massively parallel
graphics processor units (GPUs) for efficient and exact computations.
