Ingemar Bengtsson is a professor of physics of Stockholm University, a member of the Swedish Physical Society and a former board member of its Divisions for Particle Physics and for Gravitation. His research Interests are related to geometry, in the forms of classical general relativity and quantum theory. Karol Zyczkowski is a professor at the institute of Physics, Jagiellonian University, Krakow, Poland.
He has been a docent at the Center for Theoretical Physics, Polish Academy of Sciences, Warsaw since 1999 and is a member of the Polish Physical Society and Academia European. He works on quantum information, dynamical systems and chaos, quantum and statistical physics, applied mathematics and the theory of voting.