The multiverse may be more to life than we thought
Multiverse - where there is a universe - may not be so hostile to life as previously assumed, according to new research. The only question is whether there are other universes. Scientists from Durham University, University of Western Sydney and the University of Western Australia have shown that life may be common in the multiverse, if it exists. Blame - what do you think? - dark energy. Mysterious "force" that accelerates the expansion of the universe.
The scientists say that the existing theories of the origin of the universe predict much more dark energy than is observed. The addition of large amounts of dark energy would lead to such a rapid expansion that the matter would be shattered before to form stars, planets or life.
The theory of multiple universe, or multiverse, introduced in the 1980s, may explain the "lucky few" amount of dark energy in the Universe, which allowed her to shelter life, among many universes that could not.
Using powerful computer simulations of the cosmos, scientists have found that the addition of dark energy, up to several hundred times the amount observed in the universe, will not have a major impact on the formation of stars and planets. This opens up the possibility that life may appear in other universes, if they exist, scientists say. The work was published in the monthly notes of the Royal Astronomical Society.
The simulation was carried out under the project EAGLE (Evolution and Assembly of GaLaxies and their Environments), one of the most realistic model of the observable universe. Jaime Salcido, a graduate student of the Institute for Computational Cosmology at the University of Durham, said: "For many physicists inexplicable, but, apparently, a particular amount of dark energy in the Universe is a frustrating mystery."
"Our models show that even if the universe was much more or much less dark energy, it would have a minimal effect on the formation of stars and planets, giving a chance for the emergence of life throughout the multiverse."
Dr. Luke Barnes, University of Western Sydney researcher, adds: "Before the multiverse explain the observed value of dark energy as a lottery - we had the winning ticket, and we live in a universe in which there is a beautiful galaxy, giving life a chance."
"Our work shows that our ticket was too good, so to speak. He was too special, so life is not necessary. "
the Question: how much to dark energy to the point where life becomes impossible? The simulation showed that the accelerated expansion due to dark energy, almost no effect on the birth of stars, and hence to the place of origin of life. Even an increase of dark energy hundreds of times would not be sufficient to make the universe dead.
The researchers said their results were unexpected and may be problematic, since cast doubt on the ability of the multiverse theory to explain the observed value of dark energy. According to the study, if we live in a multiverse, we should observe much more dark energy than observe; perhaps 50 times greater than that observed in our universe.
Although the results do not exclude the existence of multiple universes, they hint that a small amount of dark energy in our universe would be better explained as yet undiscovered law of nature. The theory of multiple universes, does not relieve the discomfort of physicists: they will have to find another reason for a negligible amount of dark energy in our world.