Tag: Conserved current

• Classical Field Theory and the Lagrangian: From a Variational Principle for Infinitely Many Degrees of Freedom to Noether's TheoremThe Lagrangian density from the continuum limit of coupled oscillators, the Euler–Lagrange equations from the variational principle, and Noether's theorem for the Klein–Gordon field.PhysicsQuantum Field TheoryGraduateClassical field theoryLagrangian densityKlein-Gordon equationNoether's theoremConserved current~34 min