Rudnei RAMOS

The purpose of the visit is to continue with the current collaboration with Prof. Arjun Berera and Suddhasattwa Brahma on a project involving Prof. Berera's PhD student Zizang Qiu on primordial magnetic fields. In this same visit, we will also have conversations on a second project under development with the former Prof. Berera's PhD student Jaime Calderon, which also involves the student Zizang Qiu, on the methods of nonequilibrium quantum field theory applied to the study of particle production in the early universe. The potential outcome of both projects is, in the first case, to access the viability of the presence of a thermalized photon radiation bath during (warm) inflation as a mechanism to enhance the formation of primordial magnetic fields. In the second project, the outcome expected is to produce an unified description of particle production in both warm inflation dynamics, as also during reheating and in intermediate regimes. Both studies proposed above and under study are lacking an understanding in the literature. The present proposed visit will allow for us to advance in both projects, leading to their conclusion.