Posted on 12/28/2018 10:08:50 AM PST by ETL
Uppsala University researchers have devised a new model for the universe – one that may solve the enigma of dark energy.
Their new article, published in Physical Review Letters, proposes a new structural concept, including dark energy, for a universe that rides on an expanding bubble in an additional dimension.
We have known for the past 20 years that the universe is expanding at an ever accelerating rate. The explanation is the "dark energy" that permeates it throughout, pushing it to expand. Understanding the nature of this dark energy is one of the paramount enigmas of fundamental physics.
It has long been hoped that string theory will provide the answer. According to string theory, all matter consists of tiny, vibrating "stringlike" entities. The theory also requires there to be more spatial dimensions than the three that are already part of everyday knowledge. For 15 years, there have been models in string theory that have been thought to give rise to dark energy. However, these have come in for increasingly harsh criticism, and several researchers are now asserting that none of the models proposed to date are workable.
In their article, the scientists propose a new model with dark energy and our universe riding on an expanding bubble in an extra dimension. The whole universe is accommodated on the edge of this expanding bubble. All existing matter in the universe corresponds to the ends of strings that extend out into the extra dimension. The researchers also show that expanding bubbles of this kind can come into existence within the framework of string theory. It is conceivable that there are more bubbles than ours, corresponding to other universes.
The Uppsala scientists' model provides a new, different picture of the creation and future fate of the universe, while it may also pave the way for methods of testing string theory.
Explore further: Is dark energy even allowed in string theory?
More information: Souvik Banerjee et al. Emergent de Sitter Cosmology from Decaying Anti–de Sitter Space, Physical Review Letters (2018). DOI: 10.1103/PhysRevLett.121.261301
Journal reference: Physical Review Letters 
Provided by: Uppsala University
How about “Our universe is just a bubble of some other universe”?
It helps of you are a bubble head.
BS!
Tell It To Da MARINES!
GunnyG@PlametWTF?
SemperTRUMP.45! !
DON’T FERGIT TOLAUGH!
Grok It!!!!!!!
++++++++++++++++
;)
******
It helps IF you are a bubble head.
“As a kid, I tried to grasp the concepts of infinity and the universe...with little success.”
Try to grasp a finite universe and see if you have any better luck.
What’s on the other side?
Still need the nap. If the “edge” of the universe is expanding, what’s on the other side of the “edge” that’s being “expanded into”? This is just one of those things I probably will never understand.
Dark Energy doesn’t even make sense.
Expanding into what? “dimension” is not a place where you can go, it’s a standard of measurement. Keep trying.
For any system, the universe, to accelerate requires that energy be added to it but nobody can explain where this energy comes from so they create the concepts of dark energy and other dimensions. I think it more plausible that time itself is slowing down, giving the false appearance of acceleration.
I think that is the famous dark patch shot where there is nothing to be seen with most telescopes, covering about a square inch held at arm’s length of the night sky. AIR: that is over 300,000,000 galaxies shown in the image.
There is nothing beyond the edge of existence. When the Universe expands, it expands existence itself.
There was an expansion in the midst of the waters, seperating the waters above and below. The end. The sky is blue and full of water above our firmament. The globe model can not be scientifically or mathematically proven.
The term “universe” is used to designate all of reality. That would certainly include bubbles in other dimensions.
The idea of multi universes is meaningless since any other universe would necessarily be included in the one and only universe that includes all of everything and all of nothing. Multidimensionality is theoretical but not provable using 4 dimensional measurements - height, width, depth, and time.
Dark matter is merely a way to explain unexplained forces. It is a theoretical device. As, for that matter, is string theory.
I thought the speed of expansion was slowing down. How could it be increasing if entropy is in effect?
That kaboom you just heard was my head exploding...
“A commonsense interpretation of the evidence suggests a super intellect has monkeyed with physics and chemistry as well as biology to make life possible”
Fred Hoyle Physicist
We’re actually an atom in the thumbnail of a giant.
I learned that from watching Animal House.
Reminds me of Horton Hears A Who.
Would that be on the high end of electro-magnetism (cosmic rays, UV light) or the low end (infra-red, radio)? I knew a fellow who believed sound is on the EM spectrum. Do you agree with him?
I believe the universe is finite but unbounded. It’s like living on the surface of a balloon. The balloon’s surface area is finite, but you can travel around on that surface forever without finding an ‘end.’
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.