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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: 0) by Anonymous Coward on Sunday December 30 2018, @09:04PM
i guess it's something cool to think about when in a tight spot, like getting a flat tire on the highway in the middle of nowhere, or getting dumped by some hot chick out of the blue or other stuff you know can happen but never think about because thinking about it might make it come true :)
anyways, it's a theory "thrown out here" to keep smart brains busy until some irrefutable fact under the stewardship of lesser (but more brutal) brains is revealed to the betterment of humankind (think: aliens are real!)?
also, i like to think about how strong magnetic fields shrink matter ... not something everybody knows :)