Theory for time-resolved resonant inelastic x-ray scattering

This is the authors' abstract. We don't add key points for this paper.

How do we map collective excitations with time, momentum, and energy resolution? Development of time-resolved resonant inelastic x-ray scattering (tr-RIXS) shows promise. Here, the authors present a theory for the tr-RIXS cross section, and as a proof of principle, they apply the theory to single-band models to elucidate the dynamics of particle-hole excitations. This work provides a crucial bridge for understanding how excitations from complicated phases manifest in time-resolved resonant scattering experiments.