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Reversing entanglement

  1. Jun 23, 2013 #1
    Two entangled photons are created via, say SPDC, by striking a single photon on a crystal.

    The two entangled photons have a combined energy equal to that of the original photon.

    Can we, at least theoretically, combine the two photons (say by having the two entangled photons simultaneously strike at a same point in time-space on a crytal or something) back into one photon? (with the whole process obviously obeying the law of conservation of energy)

    Sort of a "reverse" entanglement.....
  2. jcsd
  3. Jun 24, 2013 #2
    Are you just talking about up conversion?

    It is a known process that you can combine two photons (often from the same source) to create a third one with energy equal to the sum of the two. This would be a probabilistic event via an atomic state. I'm not sure exactly where you imagine the entanglement coming in? What role would it play?
  4. Jun 24, 2013 #3
    Thanks for the info Zargon. Did not know earlier. the thread may be closed. perhaps, i should have said reverse of entanglement.
    Last edited: Jun 24, 2013
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