New posts in Field Theory

Conserved charges and generators

Why don't we consider the "most general" spin 1 Lagrangian, but only a special case?

$\phi^4$-theory: interpreting the RG flow

What are quantum fields mathematically?

How to calculate second-order variations of an action?

Is there just one EM field for the whole universe?

What constitutes a symmetry for Noether's Theorem?

Interpretation of the field strength tensor in Yang-Mills Theory

Is the shorthand $ \partial_{\mu} $ strictly a partial derivative in field theory?

Particle creation by a source as explained in A. Zee's QFT in a Nutshell