Researchers at the Universitat Politècnica de Catalunya · BarcelonaTech (UPC) have shown with mathematical models thatthe universe is expanding rapidly due to a small cosmological constantthat acts against gravity, as the cosmological theories of the last few years experimentally evidenced.
In an article published by the prestigious magazinePhysical Review Letters, the researchers Jaime Haro and Jaume Amorós, from the Department of Applied Mathematics I of the UPC, take up the model of the universe originally introduced by Albert Einstein at the end of the 1920s in an attempt to unify gravitation and electromagnetism, and apply this theory in cosmology. The authors arrive at the explanation of two of the main dilemmas of current cosmology: why the universe does not present singularities, despite the fact that most standard models predict its existence, and why the expansion of the universe is accelerated, instead to be decelerated as predicted by cosmology based on Einstein’s theory of general relativity.
To solve the problem of Einstein’s cosmological constant, Spanish mathematicians have relied on the mathematical technique of teleparallelism, which was introduced in physics by Einstein in the 1920s. The results of the research showa primitive universe in which the Big Bang does not exist and that evolves to our current universe, in which a small cosmological constant acts against gravity to accelerate its expansion.
The Big Bang theory produced according to general relativity, preceded that the universe has to be of static size or expand with decreasing speed. The astronomical observations of the last years, more and more precise, contradict this classic theory.Astronomers Perlmutter, Schmidt and Riess, who were awarded the Nobel Prize in Physics in 2011, already discovered this contradiction in 1998. The observations of these scientists showed thatthe universe is expanding with increasing speed. Now, the UPC researchers have evidenced this last theory with mathematical models.
