Epic Discovery: Spooky Quantum Action at Distance and Time -“It Allow Us to Send Messages from the Past to the Future”

6_4f38efb28e39334beaa2581d21c011e4 In the weird Alice-in-Wonderland world of quantum physics, two linked particles can share a single fate, even when they’re miles apart. Taking Einstein's prediction a step further, Jay Olson and Timothy Ralph at the University of Queensland in Australia  have mathematically described how this spooky effect, called entanglement, could also bind particles not through only space but alos across time. This "spooky-action" at-a-distance and now, time  has profound implications about the nature of reality but a clear understanding of it still eludes physicists.

They begin by thinking about a simplified universe consisting of one dimension of space and one of time by plotting this universe on a plane with the x-axis corresponding to a spatial dimension and the y-axis corresponding to time.

If you imagine the present as the origin of this graph, says MIT's Technology Review, then the future (ie the space you can reach at subluminal speeds) forms a wedge that is symmetric about the y-axis. Your past (ie the space you could have arrived from at subluminal speeds) is a mirror image of this wedge reflected in the x-axis. When two particles are present, both sitting on the x-axis, their wedges will overlap in the future and in the past. This has a simple meaning: these particles could have interacted in the past and could do so again in the future, but only in the areas of overlap.
Conventional entanglement cuts across this world, acting along the the x-axis, linking particles instantly in time and in defiance of the boundaries to these wedges. Olson and Ralph show is that entanglement can just as easily work along the y-axis too. In other words, entanglement is so deeply enmeshed in the universe that a measurement in the past has an automatic influence on the future.

It isn't clear exactly how such an experiment might be done to verify the phenomenon. Presumably, it wouldn't be very different to the type of teleportation that is done in labs all over the world today, as a matter of routine, Olson and Ralph say that timelike entangelment is interchangeable with the spacelike version.

If their proposal can be tested, it could help process information in quantum computers and test physicists’ basic understanding of the universe.

“You can send your quantum state into the future without traversing the middle time,” said quantum physicist S. Jay Olson of Australia’s University of Queensland, lead author of the new study.

“If you use our timelike entanglement, you find that [a quantum message] moves in time, while skipping over the intermediate points,” Olson said. “There really is no difference mathematically. Whatever you can do with ordinary entanglement, you should be able to do with timelike entanglement.”

Olson explained them with a Star Trek analogy. In one episode, “beam me up” teleportation expert Scotty is stranded on a distant planet with limited air supply. To survive, Scotty freezes himself in the transporter, awaiting rescue. When the Enterprise arrives decades later, Scotty steps out of the machine without having aged a day.

“It’s not time travel as you would ordinarily think of it, where it’s like, poof! You’re in the future,” Olson said. “But you get to skip the intervening time.”

Casey Kazan via technologyreview.com

Ref: arxiv.org/abs/1101.2565: Extraction Of Timelike Entanglement From The Quantum Vacuum



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