Diagrammatic approach to classical coherent two-dimensional infrared spectroscopy
Mike Reppert, Deborah Reppert
The authors develop a diagrammatic theory for the classical description of nonlinear response functions of anharmonic oscillators. Based on the theory, the authors demonstrate that the third-order response of a weakly anharmonic system can be qualitatively described using classical dynamics, clarifying the boundary of classical and purely quantum phenomena in relation to observations of molecular coherence.
Physical Review A•Sep 20, 2021•4 citations