An experiment on the correlation of a photon pair is introduced. The results are analyzed in the framework of quantum optics. It is shown that the vacuum state of light plays an important role for the manifestation of the non local correlation. The co...
An experiment on the correlation of a photon pair is introduced. The results are analyzed in the framework of quantum optics. It is shown that the vacuum state of light plays an important role for the manifestation of the non local correlation. The correlation can be explained neither by classical wave optics nor by any theory based on the idea of local reality. ality.