Model of vibrones in quantum photosynthesis as an analog of model of laser

TL;DR

This paper models vibronic amplification in quantum photosynthesis using a laser analog, showing that vibrones can enhance exciton transfer rates through a mechanism similar to laser amplification without inversion.

Contribution

It introduces a novel model of vibronic amplification in quantum photosynthesis based on laser theory, linking dark states to vibronic laser mechanisms without inversion.

Findings

Vibronic modes increase exciton transfer rates.

Transfer rate depends on vibronic mode parameters.

Dark states may relate to vibronic laser without inversion.

Abstract

Mechanism of vibronic amplification of transport of excitons was discussed in relation to quantum photosynthesis. Vibrones (some modes of vibrations of molecules) are observed experimentally in photosynthetic systems. In the present paper we discuss a model of vibronic amplification of quantum transfer where generation of vibrones as a coherent vibrational mode is described by an analog of semiclassical theory of laser. We consider two models --- a model of nonequilibrium three level system with vibronic mode, and some variant of a model of laser without inversion. We conjecture that dark states discussed in relation to quantum photosynthesis might be related to mechanism of vibronic "laser" without inversion which amplifies the transfer of excitons. We prove that in presence of vibronic mode transfer rate of excitons increases and compute dependence of the transfer rate on parameters of the model.