New posts in Feynman Diagrams

Spectral function and bound states in condensed matter

Feynman loop diagrams physical meaning

Proton Antiproton collision

How to compute the quantum effective action from 1PI Feynman diagrams?

How to know if a Feynman diagram is planar?

Is it possible that a series of Feynman diagrams converge?

Are the matrix elements of $S$-matrix Lorentz invariant?

Are unstable particles ever "real"?

Making use of functionals in Martin Siggia Rose formalism

Propagator Correction in $\phi^4$ theory - why doesn't this secular growth break perturbation theory?