Environment-modified three-body energy transfer

Resonant energy transfer from a donor to an acceptor is one of the most basic interactions between atomic and molecular systems. In real-life situations, are not isolated but in fact coupled their environment other atoms molecules. The presence third body can modify rate distinctive intricate ways, especially when three-site system itself interacting with larger macroscopic background such as solvent. be calculated perturbatively, which ordinarily requires summation very large numbers Feynman-like diagrams. Here we demonstrate method based on canonical perturbation theory that allows us reduce computational effort required, use this technique derive formula for three-body resonance environment. As proof principle, apply situation dimer positioned near dielectric interface, distant molecule controlling rate, finding both enhancement or suppression depending parameters.