New posts in Field Theory

Is the Lagrangian density a functional or a function?

Invariance under boosts but not rotations?

What is the difference between kinetic momentum $p=mv$ and canonical momentum?

General method of deriving the mean field theory of a microscopic theory

Any "connection" between uncountably infinitely many differentiable manifolds of dimension 4 and the spacetime having dimension four?

If Energy can be converted into mass, why can it not be converted into charge?

What is the definition of soliton?

Why can we neglect surface terms in Field Theory?

If particles get mass from the Higgs field, why do we not see Brownian motion?

Intuition behind dependence on $m^2$ in classical scalar field theory Lagrangian