Simulation of time-dependent resonant inelastic X-ray scattering using non-equilibrium dynamical mean-field theory

TL;DR

This paper introduces a new theoretical framework combining non-equilibrium dynamical mean-field theory with impurity models to simulate time-dependent RIXS signals, enabling detailed studies of ultrafast processes in complex materials.

Contribution

It develops a novel approach to simulate time-resolved RIXS without computing four-point functions, applicable to multi-orbital systems and compatible with various impurity solvers.

Findings

Successfully applied to a melting Mott antiferromagnet.

Demonstrates the method's capability to handle time-dependent RIXS signals.

Provides insights into ultrafast electronic dynamics in correlated materials.

Abstract

We develop a framework to evaluate the time-dependent resonant inelastic X-ray scattering (RIXS) signal with the use of non-equilibrium dynamical mean field theory simulations. The approach is based on the solution of a time-dependent impurity model which explicitly incorporates the probe pulse. It avoids the need to compute four-point correlation functions, and can in principle be combined with different impurity solvers. This opens a path to study time-resolved RIXS processes in multi-orbital systems. The approach is exemplified with a study of the RIXS signal of a melting Mott antiferromagnet.