Thread: The Dirac Field
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Oct26-03, 12:01 AM
P: 265
Virtual processes in vacuum never give rise to real photons, unless you're thinking of something like the Hawking effect, in which case the real photons extract real energy from the real gravitational field.
The process of creation of a real photon does take place in a process known as "polarization of a vacuum " . A photon is transformed into a virtual electron-positron pair , which is annihilated and transformed again into a photon. The members of this virtual pair (electron - positron ) during their lifetime may generate virtual photons and consequently new electron - positron pairs , which annihilate themselves to create a real photon , ann so on. Correct me if I'm wrong about this.