We know that our universe is expanding at an accelerating rate, but what causes this growth remains a mystery. The most likely explanation is that a strange force called “dark energy” drives it.
Understanding the nature of this dark energy is one of the difficult tasks of fundamental physics.
For quite a long time, it was believed that string theory would provide the appropriate answer. According to string theory, all matter is made up of tiny, vibrating "threadlike" entities. The theory also requires that there be more spatial dimensions than the three, which are now part of ordinary information.
For a long time, there were models in string theory that are thought to offer an ascent to dark energy. In any case, they are subject to ever more severe criticism, and some experts now state that none of the models proposed to date is workable.
Now, scientists at Uppsala University have developed a model for the Universe, which is expected to solve the mystery of dark energy. Their study offers another basic concept, including dark energy, for the universe, which in an additional dimension moves along an expanding bubble.
This new model with dark energy and our Universe, which moves along an expanding bubble in an additional dimension. The whole universe fits on the edge of this expanding bubble. All existing matter in the universe is compared to the end of lines that reach an extra dimension.
Scientists additionally demonstrate that an expansion of this kind of bubble may appear inside the structure of string theory. It is possible that there are more bubbles belonging to different universes.
Scientists noted: “The model gives a new, different picture of the creation and future fate of the Universe, and can also pave the way for testing string theory.”
A study published in the journal Phys. Rev. Lett.