The advent of efficient light-confining platforms marked the burgeoning of the field of Cavity
Quantum Electrodynamics (Cavity QED), which brought along the realization of exotic
phenomena that emerges under extreme light-matter interaction regimes. On the other hand,
in chemistry, the interaction between light and matter is at the core of invaluable
spectroscopic techniques and a number of photo-induced chemical processes. From a
theoretical standpoint, light-matter interaction in those scenarios can be treated …

… Later on, it is shown that Singlet Fission and Reverse-Intersystem Crossing, two
photophysical processes of technological relevance, represent an ideal testing ground to
explore the rich dynamics afforded under the polariton regime. In the latter phenomena,
special emphasis is cast upon the fleeting nature of the electromagnetic … Thus, this
chapter explores the benefits of the SC regime for RISC, and strategies to circumvent the
delocalized character of polariton modes. For that end, a generalization of a variational …