New posts in Path Integral

If a photon takes all possible paths, does it travel faster than light?

Gauge invariance of Faddeev-Popov determinant in bosonic string theory

Why does a square root term make the quantisation of action difficult?

Why can we shift the field $\phi$, so that $\langle \Omega | \phi(x) | \Omega \rangle = 0$?

Saddle point approximation and finite action configurations forming a set of zero measure

How to unify the cumulant expansion and Feynman diagram expansion?

Is there a deep reason why action comes from a local lagrangian?

Path integral for particle with spin and Dirac propagator

Path integral for fermion on circle

Path integral and Out-of-time-ordered (OTOC) correlator