Ehrenfest+R Dynamics II: A Semiclassical QED Framework for Raman Scattering

TL;DR

This paper extends Ehrenfest+R dynamics to accurately model Raman scattering within a semiclassical QED framework, capturing both coherent and incoherent signals and aligning well with established KHD theory.

Contribution

It introduces a novel application of Ehrenfest+R dynamics to Raman scattering, demonstrating its quantitative accuracy for resonant and off-resonant signals.

Findings

Ehrenfest+R dynamics accurately reproduce Raman scattering features.

The method captures both coherent and incoherent electromagnetic fields.

Results agree with Kramers-Heisenberg-Dirac theory.

Abstract

In a previous paper, we introduced Ehrenfest+R dynamics for a two-level system and showed how spontaneous emission can be heuristically included such that, after averaging over an ensemble of Ehrenfest+R trajectories, one can recover both coherent and incoherent electromagnetic fields. In the present paper, we now show that Ehrenfest+R dynamics can also correctly describe Raman scattering, whose features are completely absent from standard Ehrenfest dynamics. Ehrenfest+R dynamics appear to be quantitatively accurate both for resonant and off-resonant Raman signals, as compared with Kramers-Heisenberg-Dirac (KHD) theory.