The existence of gravitational waves is a consequence of the general theory of relativity.
Despite the fact that gravitational waves were predicted more than 50 years ago, they were measured relatively recently - in 2015 on the LIGO detector. The received signal came from the event of the merger of two black holes. The main problem in measuring such signals is their small amplitude. Therefore, despite the fact that in September 2015 it was possible to measure the gravitational wave, measuring the same signals from weaker sources is not yet possible.
Nevertheless, the study of gravitational signals has great potential: this information can be used not only in cosmology, for example, to detect new astrophysical objects, but also to test the theories of fundamental physics. Also, gravitational waves may be the key to understanding what happened in the early The universe. The gravitational waves that appeared then due to the interaction of various astrophysical objects can still be measured. This means that gravitational waves carry unique information about the processes that generated them and, consequently, about the state of the universe in an epoch unattainable by any other means.
In my work, we study the radiation of relic gravitational waves that were emitted as a result of the evolution of the inflanton field. The formation of structures is being modeled and in the future it is planned to calculate the spectrum of gravitational waves that were emitted as a result of nonlinear evolution.