i have the following questions: Bell inequalities use spin 1/2 matrices and experiments use photons. Is then the electric field horizontal or vertical after the measurement with a polarizer in other words can we assimilate the orientation of the field with a vector in the hilbert space ? How does this correspond to the quantum rule that the endstate should be normalized if the photon after measurment has less intensity ? But photons are spin 1 particle a boson, so then which state of the electrical field corresponds to the third quantum measurement result ? Thanks.