Reverse Entanglement: Theoretical Possibilities and Energy Conservation

[San K]

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...

 

[Zarqon]

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?

 

[San K]

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?

Thanks for the info Zargon. Did not know earlier. the thread may be closed. perhaps, i should have said reverse of entanglement.