I'm in a tight spot. I got accepted to an REU to do an atomic physics project using the Hartree-Fock method, and I just finished my first year in physics. I'm pretty advanced, but I've never taken a class on quantum. My other research advisor told me to read through Griffiths and that I'd be good to go. I'm near the end of the second chapter already (on harmonic oscillators). Any advice on what to read or do in the next couple of weeks before I go to my REU site to learn quantum and perturbation theory quickly?