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View Full Version : New Explanation for Dark Energy? Tiny Fluctuations of Time and Space



Fraser
2017-May-16, 08:40 PM
A new study by a team of researchers from UBC proposes a new vision of Dark Energy, where fluctuations in spacetime allow for a net expanding effect that is slowly accelerating
The post New Explanation for Dark Energy? Tiny Fluctuations of Time and Space (https://www.universetoday.com/135570/new-explanation-dark-energy-tiny-fluctuations-time-space/) appeared first on Universe Today (https://www.universetoday.com).


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Cougar
2017-May-17, 09:45 PM
Here's (https://arxiv.org/pdf/1703.00543.pdf) the pdf of the paper. These authors need an editor. The abstract is barely comprehensible. I like the fundamental idea (quantum fluctuations affecting the expansion), but this same idea must have come up almost immediately after 1998 and the discovery of the accelerated expansion. It was certainly known well before then that 'empty' space could be seen to be "seething" with virtual particles blinking in and out of existence. These must contribute in some fashion to the overall mass-energy of the universe, but we apparently don't know how to tally it up correctly (since we keep getting answers that are off by 10120). I don't know if these authors have a plausible mechanism for extracting out a small amount of "additional expansion" from the virtual particle pairs or other conjugate variables, or if they're just kind of hand-waving on that one....