Nonlinear Spectroscopy: Diagrammatic Perturbation Theory Andrei Tokmakoff MIT Department of Chemistry 2009.

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Presentation transcript:

Nonlinear Spectroscopy: Diagrammatic Perturbation Theory Andrei Tokmakoff MIT Department of Chemistry 2009

Feynman and Ladder Diagrams

3 rd order diagrams for a two-level system

3 rd order diagrams: four-level vibronic system

Third order spectroscopies

3 rd -order spectroscopy in box geometry

Two-pulse photon echo

Transient grating

Population relaxation Acoustic waves Thermal diffusion

Pump-probe / transient-absorption

Coherence and wavepackets in pump-probe

CARS (coherent anti-Stokes Raman scattering)