My name is Pietro Ghedini and I am a PhD student of Theoretical Physics within the Instituto de Física Corpuscular (IFIC), under the supervision of professors Olga Mena and Stefano Gariazzo. In 2022 I earned my Bachelor degree in Physics from the University of Ferrara, working on my thesis under the supervision of professor Massimiliano Lattanzi and with the support of Dr. Luca Caloni. I then moved to the University of Bologna for my Master Degree, choosing the Theoretical Physics curriculum. I graduated in 2024, under the supervision of professors Silvia Pascoli and Olga Mena and with the support of Dr. Rasmi Hajjar. My current research focuses on cosmology, in particular on the study of models beyond the standard cosmological model.