Pérez Rojas is senior researcher at the Institute of Cybernetics, Mathematics and Physics, Ministry of Science and Technology, Cuba; emeritus member of the Academy of Sciences of Cuba; and member of the Latin American Academy of Sciences. His national awards include the Rafael Maria Mendive and Carlos J. Finlay Medals. He was awarded in 2011 the National Prize in Physics from the Cuban Physical Society. His interests include quantum field theory and its applications to finite temperature problems in high energy physics and condensed matter. Among these, he has devoted special attention to quantum electrodynamics in matter and in vacuum in the presence of external fields, phase transitions in electroweak theory, relativistic quantum Hall effect, Bose-Einstein condensation in magnetic fields, and applications of physics to social sciences.