Particle energy and momentum are obtained from the wave function as eigenfunctions of the spatial and time derivative operators. Is this true of ElectroMagnetic fields? In other words are E and B eigenfunctions of a differenial operator? I can see that E and B could be interpreted as a kind of generalised velocity (q) because that's how the flux of E and B are definded through a surface. But I can't find any websites or references that show how E and B corespond to generalised co-ordinates and their derivatives. Nor can I find what the EM wavefunction or what its Schrodinger equation might be Anybody help me?