Théorique, numérique
Gravitational waves constitute a new observational instruments which convey new information about our Universe and its structures in a completely complementary way with respect to standard electromagnetic observations. In particular gravitational waves emitted by the mergers of black hole and neutron star binaries can be used to test how fast the universe expands at different epochs of its evolution. Consequently different cosmological models can be tested with gravitational waves, with new possible insights into the contemporary mysteries of the Universe such as dark energy, dark matter, the Hubble tension, and others. This internship project aims at investigating standard and alternative scenarios describing the evolution of our Universe using gravitational-wave observations from current and next generation gravitational-wave observatories. The student will become familiar with the basics of the theory of gravitational waves and with Bayesian statistical inference, she/he will get acquainted with some of the advanced theoretical and computational state-of-the-art techniques used in gravitational-wave cosmology. She/he will also have the opportunity to work within the framework of large international collaborations dedicated to observe gravitational waves, in particular the LIGO-Virgo-KAGRA Collaboration, the LISA Consortium and the Einstein Telescope Consortium.