# Wannier-Function-Based Approach to Coupled Exciton-Phonon-Photon Dynamics in Two-Dimensional Semiconductors Source: [Wannier-Function-Based Approach to Coupled Exciton-Phonon-Photon Dynamics in Two-Dimensional Semiconductors]() Collection index: [llms.txt]() Data updated: 2025-10-25T08:34:10.943Z Authors: Alexander Steinhoff, Frank Jahnke, Matthias Florian Published: 2025-03-17T17:48:20.000Z ## Abstract Marrying the predictive power of ab initio calculations with many-body effects remains a challenging task in two-dimensional (2d) materials, where efficient carrier-carrier interaction challenges established approximation schemes. In particular, understanding exciton-phonon interaction from first principles is a field of growing interest. Here, we present a many-body theory for coupled free-carrier, exciton, phonon and photon dynamics based on carrier-carrier and carrier-phonon interaction matrix elements obtained via projection on Wannier orbitals. The framework is applied to study the impact of carrier-phonon correlations on optical spectra and coupled nonequilibrium carrier-phonon kinetics in monolayer MoSe$\_2$. We find that non-Markovian effects and dynamical buildup of quasi-particles are only properly described if correlations at least on the two-phonon level are included. Our studies open a perspective to advance the material-realistic description of nonequilibrium physics in 2d nanostructures to new many-body realms. ## Recorded benchmark results A research result applies to its stated dataset, split, metric and evaluation configuration. Compare like-for-like settings, preserve the metric's unit and direction, and distinguish paper-reported results from independent reproduction. The best result recorded here is not a claim of exhaustive, current global coverage. ## Original sources and implementation [Original paper]() [PDF]()