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 most difficult tasks in fundamental physics.
It has long been believed that string theory will give the appropriate answer. According to string theory, all matter consists of tiny, vibrating "string-like" entities. The theory also requires that there are more spatial dimensions than the three that now belong to ordinary information.
String theory has long presented models that are believed to offer rise to dark energy. In any case, there have been more and more criticisms, and some experts currently claim that none of the models proposed so far is workable.
Scientists at the University of Uppsala have now developed a model for the universe, namely, the universe is expected to solve the mystery of dark energy. Their study suggests another basic concept, including dark energy for a universe riding on an expanding bubble in an additional measurement.
This new model with dark energy and our universe on an expanding bubble in an extra dimension. The entire universe is at the edge of this expanding bubble. The entire matter in the universe can be compared to the end of the strings, which protrude into the extra dimension.
The scientists also show that an extension of the bubble of this kind can occur in the structure of string theory. It is possible that there are more bubbles that relate to different universes.
The scientists stated, "The model provides a new, different picture of the creation and future fate of the universe, while also paving the way for test methods. String theory.
The study is published in the journal Phys. Rev. Lett.