Germán Sierra is a Spanish theoretical physicist, author, and academic. He is Professor of Research at the Institute of Theoretical Physics Autonomous University of Madrid-Spanish National Research Council. Sierra's research interests span the field of physics and mathematical physics, focusing particularly on condensed matter physics, conformal field theory, exactly solved models, quantum information and computation and number theory. He has authored two books entitled, Quantum Groups in Two-dimensional Physics and Quantum electron liquids and hight-Tc Superconductivity and also has published over 200 articles. For more details see: https://en.wikipedia.org/wiki/Germ%C3%A1n_Sierra