Principles Of Nonlinear Optical Spectroscopy A Practical Approach Or Mukamel For Dummies Updated 95%

You kicked the molecule at color A and asked about color B. If a cross peak appears, the molecule squeaked, "We are connected."

Before reading the book, play with software like Spectron or Python-based packages that let you "build" a 2D spectrum visually. You kicked the molecule at color A and asked about color B

Imagine a crowded room where everyone is talking. In a 1D spectrum, you just hear a loud roar (an "inhomogeneously broadened" peak). You can’t tell who is talking to whom. the molecule squeaked