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An expanding bubble in an extra dimension – ScienceDaily



Uppsala University researchers have devised a new model for the Universe – one that may solve the enigma of dark energy. Their new article, published in Physical Review Letters proposes a new structural concept, including dark energy, for a rides on an expanding bubble in an additional dimension.

We have known for the past 20 years that the Universe is expanding at ever accelerating rate. The explanation is the "dark energy" that permeates it throughout, pushing it to expand. Understanding the nature of this dark energy is one of the paramount enigmas of fundamental physics.

It has long been hoped that string theory will provide the answer. According to string theory, all matter of tiny, vibrating "stringlike" entities. The theory is also part of everyday knowledge. For 1

5 years, there have been models in string theory that have been thought to give rise to dark energy.

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. The researchers thus show that expanding bubbles of this child can come into existence within the framework of string theory.

The Uppsala scientists' model provides a new, different picture of the creation and future fate of the Universe, so it may also pave the way for methods of testing string theory.

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Materials provided by Uppsala University . Note: Content may be edited for style and length.


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