It all started with the Big Bang some 13.7 billion years ago, and the universe is still expanding. It has been almost two decades that we know about the expanse of the universe with an ever-accelerating rate.
A new model of the expansion of the universe has been proposed by the scientists of Uppsala University, Sweden. This new theoretical model portrays the universe as an entity that rides on an ever-expanding bubble in an additional dimension other than the three dimensions in place. This new concept can be proved fruitful in shedding some light on the process of expansion of the universe and also on dark energy.
The model can also create a new and different picture about the creation and the fate of the universe in future. It can also help in developing methods for testing the traditional String Theory.
The universe gathers the energy for its expansion from what is called the ‘dark energy’. In other words, dark energy pushes the universe to expand. The dark energy is a form of energy that could behave like an exact opposite of gravity. Gravity tends to keep things clubbed by pulling them towards one another. But dark energy supports the expansion of the universe by letting objects move away from one another.
But dark energy is still an enigma of fundamental physics. For long, it has been argued and thought that the enigma of dark energy could be resolved through one of the most fascinating theories of physics—the ‘String Theory’. This theory says that all matter is made up of tiny string-like entities that are in constant vibrational mode. The vibrations of the strings determine the mass and charge of the greater particles. The String Theory is also called the “Theory of Everything”.
For almost 15 years, there have been lots of models that are thought to give rise to dark energy. But, lately, all these models face criticisms from theoretical physicists. Their argument is that none of these models could actually reveal dark energy or expansion of the universe.
There have been many efforts ongoing to develop models to explain the mysteries of the universe that can go beyond the String Theory. At this juncture, the new model developed in the Uppsala University could be an eye opener.
The scientists proposed in their new model that dark energy and our universe is riding on an expanding bubble in an extra dimension. The whole universe is accommodated on the edge of this expanding bubble according to the new model.
This new model could be perceived as an extension of the String Theory. The scientists show that the expanding bubble of this kind can be existent within the framework of the string theory.