02 Apr '17, 12am

Entangled photons might not have to originate from the same location

Entanglement is one of the spookiest discoveries of quantum theory. (In fact, Einstein himself referred to the phenomenon as "spooky action at a distance.") It involves two particles, such as photons, that are somehow instantaneously linked to one another even if they are separated by vast distances. The phenomenon is super anti-intuitive, but there is at least one aspect to entanglement that our intuitions can hang their hats on: entangled particles are at least supposed to originate from the same location. Or maybe not. Researchers at the University of East Anglia (UEA) have identified entangled photons that each emerged from different points in space. It's a profound discovery that makes the phenomenon of entanglement spookier than ever, and it could challenge the very foundation of quantum theory itself. "Until now, it has been assumed that such paired photons come fro...

Full article: http://www.mnn.com/green-tech/research-innovations/storie...

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