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
There’s expansion going on the appears to be accelerating, and the farther out you look, the faster the expansion.
God's divine supernatural realm
What’s above and below the balloon surface? After all a balloon has three dimensions, not just the two of the surface.
Our 3D universe could wrap itself around like a balloon only if there was a 4th dimension.
The critters living on the balloon surface live in a two dimension world. There is no above or below.
They may think they live in a 2D world but as a matter of fact they are on a 3D world. A sphere is 3D. That they are unaware of it doesn’t change that fact.
You cannot make a 2D sphere.
It gets more complicated and even troubling, but you get used to it, more or less.
It gets more complicated and even troubling, but you get used to it, more or less.
Light and sound both travel in waves, but not of the same type. Visible light is part of the electromagnetic spectrum, and can therefore travel through a vacuum. Sound propagates as a longitudinal wave, and needs a medium (e.g. air) to travel through.
You mean that you can’t hear Captain Kirk coming in the Enterprise?
Sound can be produced by the EM Spectrum.
He probably had his quarters soundproofed.
“We have known for the past 20 years that the universe is expanding at an ever accelerating rate. “
We KNEW it was INFINITE.
Then we KNEW it was not infinite, but was shrinking.
Next, we KNEW it was not infinite, but was expanding.
Recently, we KNEW it was expanding, but at an ever accelerating rate.
WHAT will we KNOW next ?
I propose the DARK STRING theory.
Galaxies are held together by massive balls of string that are ‘dark’ and cannot be seen.
A better question would be, why is the output from a MAGNET not on the electro-magnetic spectrum ?
lol...Thought I might not of made my point but we clearly communicated!
Very well....Which came first?
Space or matter ?
If space , was there time ?—nothing can “happen” without an occurrence of matter changing its form.. Time is merely measuring the changes in things(Matter)
If matter was first, into what did it appear?
Lotsa funny things happen with ‘words’....
It’s one of those cases when time doesn’t matter.
Let there be light !
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