Lagrangian formalism

  • #1
Hi,

May anybody tell the pre-reqs (on calculus) for learn the lagrangian formalism used on quantum field theory ? :confused:

Thanks.
 

Answers and Replies

  • #2
malawi_glenn
Science Advisor
Homework Helper
4,786
22
well integration and differentiation with several variables, functionals
 
  • #3
993
63
In addition, a knowledge of basic Newtonian mechanics is helpful.

However, you mention its use in QFT. If that's your goal, you'll need a lot more physics. In the introduction to his QFT book, Mark Srdnecki gives a set of equations, mostly from QM, that one should be familiar with as prerequisites. See page 8 of

http://www.physics.ucsb.edu/~mark/ms-qft-DRAFT.pdf

Expressed in English, you should be comfortable with:

  1. Differential scattering cross-section.
  2. Creation and annihilation operators.
  3. Angular momentum ladder operators.
  4. Evolution of operators in the Heisenberg picture.
  5. Obtaining the Hamiltonian from the Lagrangian.
  6. Lorentz transformations.
  7. Relativistic energy-momentum.
  8. Electromagnetic vector potential.

Topics that are covered in good QM, E&M, and mechanics texts.
 

Related Threads on Lagrangian formalism

  • Last Post
Replies
13
Views
6K
Replies
8
Views
2K
  • Last Post
Replies
5
Views
2K
Replies
10
Views
4K
  • Last Post
Replies
2
Views
2K
Replies
7
Views
863
Replies
68
Views
3K
  • Last Post
Replies
16
Views
8K
  • Last Post
Replies
4
Views
999
Replies
2
Views
886
Top