Transform-limited-pulse representation of excitation with natural incoherent light

Aurélia Chenu, Paul Brumer
2016 Journal of Chemical Physics  
We study the natural excitation of molecular systems, applicable to, for example, photosynthetic light-harvesting complexes, by natural incoherent light. In contrast with the conventional classical models, we show that the light need not have random character to properly represent the resultant linear excitation. Rather, thermal excitation can be interpreted as a collection of individual events resulting from the system's interaction with individual, deterministic pulsed realizations that
more » ... tute the field. The derived expressions for the individual field realizations and excitation events allow for a wave function formalism, and therefore constitute a useful calculational tool to study dynamics following thermal-light excitation. Further, they provide a route to the experimental determination of natural incoherent excitation using pulsed laser techniques.
doi:10.1063/1.4940028 pmid:26827198 fatcat:abuhfxbkgzfidbntjblmpwjhbi