The probability density is given by the square of that field. In that sense you can think of it as the wave function.Ratzinger said:But E(r,t) is not a quantum wave function, or is it? On the other hand I saw in my quantum text that it's interpreted just like that. Then I read here on physicsforums it's all wrong, it's ripples in quantum fields.
Could someone explain the relationship photon-quantum wave-classical EM wave?