Quantum Mechanics . PHYS 115C
The variational principle, time dependent perturbation theory, the adiabatic theorem. Topics from: WKB approximation, the Dirac equation, Berry's phase, Bell's inequality, quantum cryptography, quantum computation.
Prerequisites: Physics 115B with a minimum grade of C-.
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Helpful and organized.
Xu is the most helpful professor I have ever met, he is always open to students' questions. Most important, he is very brilliant and inspiring. As his convention, the first day lecture would mention the tensor which is the content should be learned in UD course, don't be scared, because his homework and exams are quite easier than you expect :)
Prof Xu is nice in person. Reply emails really fast. Yet exams are HARD. Homework not as hard, but some say it isn't close to exam questions. If you get extremely complicated expressions for your answer on exams, do trust yourself. The correct answers often look insane, and you should always attempt every problem cuz graders give partial credit.
Generally clear in the teaching. The class is very theoretical and focuses heavily on simplified models. Doing the homeworks made me very familiar with Mathematica too!
Claudio Campagnari
3.4
David Weld
4.5
Omer Blaes
4.6
Chenhao Jin
2.0