New posts in Symmetry

What does a symmetry that changes the Lagrangian by a total derivative do to the Hamiltonian $H$?

Why do we care only about canonical transformations?

Elementary argument for conservation laws from symmetries *without* using the Lagrangian formalism

Symmetries in quantum mechanics

What is the symmetry of the pion triplet ($\pi^{-}, \pi^{0}, \pi^{+}$)?

Why doesn't superselection forbid almost every superposition?

Global $U(1)$ symmetry of 2+1D Abelian-Higgs Model

Is the molecular term ${}^1\Sigma^-$ possible in a molecule?

Why is Noether's theorem important?

Can a global symmetry be gauged without being made local?