Canadian Physicists Present New Model of the Universe's Birth

Researchers from the University of Waterloo and the Perimeter Institute in Canada have introduced a groundbreaking mathematical model of quadratic gravity that offers a unique explanation for the origin of the universe. In their recent paper published in the scientific journal Physical Review Letters, the scientists detailed the results of their study, which integrates quantum mechanics and the theory of relativity, as reported by Gizmodo.

Traditionally, it has been believed that the universe began from small, hot, and dense states. The most popular inflationary model explains this phenomenon by suggesting that the accelerated expansion of the cosmos was initiated by a hypothetical particle known as the inflaton. However, this concept loses its persuasiveness when considering even earlier astronomical periods characterized by extremely high energies.

The team of scientists decided to try a new approach based on what is known as quadratic gravity. This revised version of Einstein's standard theory, according to the researchers, remains mathematically stable even at the extreme energy levels observed in the early universe. "Imagine Einstein squared," explains theoretical cosmologist and co-author of the study Jerome Quintin. He also notes that the research "takes formal calculations from quantum field theory and creates a bridge between them and real cosmological scenarios and observations."

The physicists assert that their calculations indicate that quadratic elements can initiate cosmic expansion on their own. Following this, the structure of space-time transitions to the well-known rules of the theory of relativity, allowing for the stability of the model to be preserved. This new theory, unlike most quantum concepts, can be empirically tested, which is a crucial aspect of scientific research.

The mathematical model of quadratic gravity points to a specific minimum level of gravitational waves that can be generated during the expansion of the universe. These waves could potentially be detected using next-generation detectors, such as the LISA observatory, which is expected to launch in 2035. According to senior author of the study Niayesh Afshordi, quantum gravity "can be studied and combined with specific cosmological scenarios that come with specific predictions that we can test now and in the future."

Thus, the new model of quadratic gravity may represent an important step in understanding the birth of the universe and the evolution of the cosmos, opening new horizons for research in the fields of physics and cosmology.