- #1

live4physics

- 24

- 0

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

Thanks.

You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

- Thread starter live4physics
- Start date

- #1

live4physics

- 24

- 0

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

Thanks.

- #2

malawi_glenn

Science Advisor

Homework Helper

Gold Member

2022 Award

- 6,200

- 1,690

well integration and differentiation with several variables, functionals

- #3

Daverz

- 1,001

- 74

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:

- Differential scattering cross-section.
- Creation and annihilation operators.
- Angular momentum ladder operators.
- Evolution of operators in the Heisenberg picture.
- Obtaining the Hamiltonian from the Lagrangian.
- Lorentz transformations.
- Relativistic energy-momentum.
- Electromagnetic vector potential.

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

Share:

- Last Post

- Replies
- 14

- Views
- 268

- Replies
- 11

- Views
- 631

- Last Post

- Replies
- 0

- Views
- 441

- Replies
- 20

- Views
- 636

- Replies
- 3

- Views
- 360

- Replies
- 6

- Views
- 306

- Replies
- 8

- Views
- 463

- Replies
- 31

- Views
- 2K

- Last Post

- Replies
- 4

- Views
- 636

- Last Post

- Replies
- 14

- Views
- 937