Choose your pathways (Which Feynman diagrams are physically possible?).
In normal (linear) spectroscopy, you hit a molecule with one photon, and it does one thing—like absorbing it or bouncing it back. Choose your pathways (Which Feynman diagrams are physically
Confusing ( T_1 ) (population lifetime) and ( T_2 ) (dephasing time). Fix: ( T_2 ) = ( 1/( \textlinewidth ) ). ( T_1 ) = how long excited state lives. Always ( T_2 \le 2T_1 ). If your ( T_2 ) is shorter than ( 2T_1 ), you have pure dephasing. Fix: ( T_2 ) = ( 1/( \textlinewidth ) )
That is Mukamel for dummies. Fixed.
Authored by Peter Hamm, this guide simplifies Mukamel's heavy mathematical formalism into a practical framework for experimentalists. UCI Department of Chemistry Unified Framework : It reduces complex experiments like Photon Echoes Pump-Probe into a single underlying physical description. Density Matrix & Liouville Space : Rather than focusing on wavefunctions, it uses the Density Matrix If your ( T_2 ) is shorter than
To the uninitiated, it looked like a textbook. To Leo, it looked like a 500-page deterrent against graduating.
2D spectroscopy works like 2D-NMR. It produces a map with cross-peaks. If a peak appears at coordinates