A team of theoretical physicists from Uppsala University in Sweden has developed a new model for our Universe – one that can uncover the mystery of dark energy – a factor that, apparently, is the cause of the expansion of the Universe.
In the 1990s, astrophysicists discovered that our universe is expanding at an increasing rate, implying that space is not empty, but instead filled with a mysterious "substance" – the so-called dark energy – that repels matter.
The nature of this energy is one of the biggest mysteries in fundamental physics.
“It has long been hoped that string theory will answer,” said lead author Dr. Suvik Banerjee and his colleagues.
"According to this 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 already part of everyday knowledge."
"For 15 years, string models have existed models that are thought to generate dark energy."
"However, they have become increasingly harshly criticized, and some researchers now argue that none of the models proposed to date are working."
In their new article published in the journal Physical review lettersDr. Banerjee and colleagues propose a new model with dark energy, and our Universe is moving along an expanding bubble in an extra dimension.
“The whole Universe is on the edge of this expanding bubble,” they said.
"All existing matter in the Universe corresponds to the ends of the strings that extend into an extra dimension."
"We also show that expanding bubbles of this type can occur in the framework of string theory."
"It is possible that there are more bubbles than us, corresponding to other universes."
Suvik Banerjee other, 2018. De Sitter's emergent cosmology from the decomposing anti-de Sitter space. Phys. Rev. Lett 121 (26); doi: 10.1103 / PhysRevLett.121.261301