**Winter 2012**

**The final exam is now ready, you can take it during any 24 hour period. Email me your desired start time.***

***Note: I will not be in constant contact, so for best results give me a day's notice.**

Minor typo: Problem 3, argument of cos is kappa_0 phi_0

**Instructor:** Joe Polchinski, joep@kitp.ucsb.edu

**Course Web Site:** http://www.kitp.ucsb.edu/physics-221a-quantum-field-theory

**Class:** TTh 9:30-10:45 Phelps 3519

**Office Hours:** Usually T 2-3, W 1:30-2:30, Kohn (KITP) 2139, and by appointment. This may change from week to week due to conditions beyond my control, so check back here.

**Textbook:** Quantum Field Theory, Srednicki.

**Homework:** Weekly, due Wednesday at 5 at Ben Michel's mailbox, 1st floor Broida

**Grader:** Ben Michel, OH T 2:15-3:45 and W 12:30-1:30. Except for short questions I suggest you come to my office hour, Ben will have his hands full with the grad QM students. ** **

**Final exam:** Take-home

Every QFT text has strengths and weaknesses, so it is useful to be familiar with several. **Peskin & Schroeder** and**Weinberg** are both good references: not as easy-reading as **Srednicki**, but more thorough on some of the more technical subjects. I have used **Ramond** and **Ryder** in the past as well - more at Srednicki's level, but drier.

Th 9/27: Ch. 1: What is QFT? Why QFT?

TTh 10/2,4: Ch. 2-4: Canonical quantization of free scalar, Lorentz invariance

TTh 10/9,11: Ch. 6-8: Path integral quantization

TTh 10/16,18: Ch. 8-10: Path integrals for free and interacting field theory

TTh 10/23, 25: Ch. 5,10,11: Scattering amplitudes and cross sections, LSZ (briefly). Also, ch. 12 dim. analysis, and ch. 13, spectral representation (briefly).

TTh 10/30, 11/1: Ch. 14,16: Loop calculations of propagator and vertex.

TTh 11/6, 8: Ch. 17-19: General loops and renormalizability. Ch. 22: Noether's theorem: symmetries

TTh 11/13, 15: Ch. 22-24: Symmetries

T 11/20: Ch. 27,28: Renormalization group

TTh 11/27, 29: Ch. 28,29: Renormalization group and effective field theory. Ch. 30-32 Spontaneous symmetry breaking.

TTh 12/4, 6: Special topics

Homework #1, Due at beginning of class 10/4. Solutions #1

Homework #2: Sred. 3.3, 3.4, 3.5. Due 10/10. Solutions #2

Homework #3, Due 10/17. Solutions #3

Homework #4, Due 10/24. Solutions #4

Homework #5, Due 10/31. Solutions #5

Homework #6, Due 11/7. Solutions #6

Homework #7, Due 11/14. Solutions #7

Homework #8, Due 11/28. Solutions #8