Quantum entanglement just got more exciting.
Photon reaches from beyond the grave in quantum trick
An experiment by Hagai Eisenberg extends the idea of "spooky action at a distance" to time by entangling a pair of photons that never coexisted.
If you have two pairs of entangled photons, taking one photon from each pair and entangling them disengages the two original pairs, and creates a second, f…
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