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from the unterminated-strings-cause-inflation dept.
Submitted via IRC for SoyCow1984
Our universe: An expanding bubble in an extra dimension
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.
Journal Reference:
Souvik Banerjee, Ulf Danielsson, Giuseppe Dibitetto, Suvendu Giri, Marjorie Schillo. Emergent de Sitter Cosmology from Decaying Anti–de Sitter Space. Physical Review Letters, 2018; 121 (26) DOI: 10.1103/PhysRevLett.121.261301
(Score: 3, Insightful) by Gaaark on Sunday December 30 2018, @06:41PM (4 children)
String theory and dark energy.... let's throw in dark matter too.
And ghosts.... hey, unicorns too!
Throw it all into a blender with the
(wouldn't want to offend people like Trump did) and you have a whole mess of imaginary shit that people throw up when they have no answers.
Why don't i have two heads? Because dark matter! Booyah!
Why are my poops sometimes red? Beets me...maybe string theory? HEY!!! BOOYAH!!
Sigh: we need better scientific answers than string-out-the-butt-theory, dark energy and dark matter.
Lets spend money on REAL SCIENCE!
--- Please remind me if I haven't been civil to you: I'm channeling MDC. ---Gaaark 2.0 ---
(Score: 4, Touché) by hopdevil on Sunday December 30 2018, @07:27PM (3 children)
I'm not sure I understand where your rage is coming from; this idea is a great example of how theoretical physics (or other sciences) tend to play out.
There are a bunch of unexplainable events/measurements that don't quite fit any existing theory. So people attempt to explain (hypothesize) in the most rigorous way a new theory that fits old and new data. Then they identify experiments that can prove or disprove this hypothesis. The scientific method isn't perfect, but it is sure better than anything else humanity has come up with.
Don't take so seriously dark matter/dark energy as proven things; they are the "leftovers" that can't be explained from the last-best-theory.
Are you mad that people get paid money to come up with new ideas and push the envelope? Or that coming up with the next best explanation for the universe is difficult and yes, expensive (people hours/computation)? What do you propose, give up until everyone agrees with what you think is "REAL SCIENCE"?
There is also the issue where it is quite difficult to make experiments, we only recently demonstrated we could measure gravitational waves. So 80 years+ of technological advancements and many millions in $$$ funding necessary.
I would say ask your doctor, but you might not give much thought to biological sciences either..
(Score: 0) by Anonymous Coward on Sunday December 30 2018, @07:31PM (1 child)
Gaaark is a dark matter truther.
(Score: 2) by Gaaark on Sunday December 30 2018, @08:16PM
No, Gaaark just likes the scientific method not hand-waving.
--- Please remind me if I haven't been civil to you: I'm channeling MDC. ---Gaaark 2.0 ---
(Score: 4, Interesting) by zocalo on Sunday December 30 2018, @08:17PM
*Some* people do anyway. A common complaint leveled by critics of string theory is that its proponents have yet to provide any testable experiments to go with their hypothesis, and while I've not performed an exhaustive search this does appear to be the case. The flipside of that is that whenever a flaw *is* found in their hypothesis they just come up with an even more elaborate workaround to continue the research (or get more funding, to take the cynical view). All in all, it sounds remarkably similar to the whole flat earth thing, only with funding grants and tenure.
Dark matter/energy advocates on the otherhand might not be having much luck (so far at least) working out what the stuff really is, but they are at least ruling out possible theories and once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth. Of course, that might just turn out to be string theory. :)
UNIX? They're not even circumcised! Savages!