Back From The Future - The Illusion of Past Cause -> Future Effect

red dot is the past emitter, blue dot is the future absorber
red history wave is retarded moving from past to future
blue destiny wave is advanced moving back from the future
Note the destructive interference before the emission and after the absorption,
constructive interference in between giving the illusion of only past causes
http://www.npl.washington.edu/ti/
is a good reference to this

Our future event horizon is the total absorber of last resort catching every emitted photon that is not absorbed by real electric charges. When an electron absorbs a photon of frequency f it disappears i.e. equivalent to a photon f = ck = 0. Our future event horizon is an infinite redshift surface, i.e. a photon we emit has frequency f = ck = 0 when it crosses the event horizon, this triggers a return advanced photon wave that blue shifts back to f at the moment of emission closing the loop in time.