*In conclusion, we have demonstrated quantum entanglement between two photons that do not share coexistence. Although one photon is measured even before the other is created, full quantum correlations were observed **by measuring the density matrix of the two photons, conditioned on the result of the projecting measurement.*
A demonstration of retrocausation (retrodependency). @philipthrift On Saturday, July 6, 2019 at 5:17:07 PM UTC-5, Lawrence Crowell wrote: > > This is interesting, where photons that existed at different times can be > entangled. > > https://arxiv.org/pdf/1209.4191.pdf > > Entanglement Between Photons that have Never Coexisted > > E. Megidish, A. Halevy, T. Shacham, T. Dvir, L. Dovrat, and H. S. > Eisenberg > > Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem > 91904, Israel > > The role of the timing and order of quantum measurements is not just a > fundamental question of quantum mechanics, but also a puzzling one. Any > part of a quantum system that has finished evolving, can be measured > immediately or saved for later, without affecting the final results, > regardless of the continued evolution of the rest of the system. In > addition, the non-locality of quantum mechanics, as manifested by > entanglement, does not apply only to particles with spatial separation, but > also with temporal separation. Here we demonstrate these principles by > generating and fully characterizing an entangled pair of photons that never > coexisted. Using entanglement swapping between two temporally separated > photon pairs we entangle one photon from the first pair with another photon > from the second pair. The first photon was detected even before the other > was created. The observed quantum correlations manifest the non-locality of > quantum mechanics in spacetime. > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/702eb3d3-21c6-4124-9297-0b72850b8784%40googlegroups.com.
