In 1934 Breit and Wheeler predicted that collision of two photons may yield matter. Experimental evidence of this prediction was very recently demonstrated by Pike et al
(Nature Photonics, 18 May 2014). A photon is also considered a wave packet. Usually when two waves interact then it may give rise to interference or diffraction pattern. How can the collision of two wave packets give rise to matter? Is it wave matter?
arXiv.org > physics > arXiv:1109.1673v1- Here abaut collision of two photons
Is there an actual experimental demonstration? As I saw the paper it was only a possible route to doing an experiment, simulated theoretically to support the basic prediction of quantum electrodynamics from 1934. The experimental demonstration would be something much more interesting.
The wave theory takes no account of QM effects. If the light is Intense enough it will affect the motion of "virtual" electron positron pairs in the vacuum stopping them recombining. Well this is one visualisation. Wave theory does not have a background of virtual particles so will never predict the effect.
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