New posts in Symmetry

What is the physical implication(s) of the isomorphism between ${\rm SO}(2)$ and $\mathbb{R}/\mathbb{Z}$?

Microcanonical ensemble, ergodicity and symmetry breaking

Gravitational field on surface of spherical shell

What does it mean for an action to be invariant under $x \to x'$, $\phi \to \phi'$?

Is it possible to have renormalisable C-, P-, or T-violating terms in QED?

Conserved charges and generators

Why do the Lagrangian and Hamiltonian formulations give the same conserved quantities for the same symmetries?

What constitutes a symmetry for Noether's Theorem?

Why is there no anomaly when particle mechanics is quantized?

Wouldn't we have an additional conservation law in a spherical Universe?