# P and T transformations of EM vector potential

1. Apr 9, 2009

### TriTertButoxy

Help! What are the P and T transformation laws for the electromagnetic vector potential, $A_\mu$? and how are these consistent with the transformation laws of the electric and magnetic vectors that I am familiar with?

under P: E is odd, B is even
under T: E is even, B is odd

When I try to use the formulas,
$$\mathbf{E}=-\nabla\phi-\frac{\partial\mathbf{A}}{\partial t}$$
$$\mathbf{B}=\nabla\times\mathbf{A}$$,
I get incorrect results.