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14 December 2013

Spooky physics phenomenon may link universe's wormholes

http://www.nbcnews.com/science/spooky-physics-phenomenon-may-link-universes-wormholes-2D11690659?lite&lite=obinsite
This visualization of the universe as it condenses around fluctuations in the density of dark and ordinary matter is a result from a collaboration between Argonne National Lab in Illinois and the San Diego Supercomputer Center in California.
 
Wormholes — shortcuts that in theory can connect distant points in the universe — might be linked with the spooky phenomenon of quantum entanglement, where the behavior of particles can be connected regardless of distance, researchers say.
These findings could help scientists explain the universe from its very smallest to its biggest scales.
Scientists have long sought to develop a theory that can describe how the cosmos works in its entirety. Currently, researchers have two disparate theories, quantum mechanics and general relativity, which can respectively mostly explain the universe on its tiniest scales and its largest scales. There are currently several competing theories seeking to reconcile the pair.
 
Recently, theoretical physicists Juan Martín Maldacena at the Institute for Advanced Study in Princeton and Leonard Susskind at Stanford University argued that wormholes are linked with entanglement. Specifically, they suggested that wormholes are each pairs of black holes that are entangled with one another.

Jensen and his colleague theoretical physicist Andreas Karch at the University of Washington in Seattle investigated how entangled pairs of particles behave in a supersymmetric theory, which suggests that all known subatomic particles have "superpartner" particles not yet observed. The theory was one proposed to help unite quantum mechanics and general relativity.

An idea in this theory is that if one imagines certain quantum mechanical systems exist in only three dimensions, their behavior can be explained by objects behaving in the four dimensions that general relativity describes the universe as having — the three dimensions of space, and the fourth of time. This notion that actions in this universe may emerge from a reality with fewer dimensions is known as holography, akin to how two-dimensional holograms can give the illusion of three dimensions. 
 
Jensen and Karch found that if one imagined entangled pairs in a universe with four dimensions, they behaved in the same way as wormholes in a universe with an extra fifth dimension. Essentially, they discovered that entanglement and wormholes may be one and the same.
 
"Entangled pairs were the holographic images of a system with a wormhole," Jensen said. Independent research from theoretical physicist Julian Sonner at the Massachusetts Institute of Technology supports this finding.
 
"There are certain things that get a scientist's heart beating faster, and I think this is one of them," Jensen told LiveScience. "One really exciting thing is that maybe, inspired by these results, we can better understand the relation between entanglement and space-time."