At what university did professor Lee Smolin popularize the theory of casual dynamical triangulation (CDT)? 
Causal dynamical triangulation: Causal dynamical triangulation (abbreviated as CDT) theorized by Renate Loll, Jan Ambjørn and Jerzy Jurkiewicz, and popularized by Fotini Markopoulou and Lee Smolin, is an approach to quantum gravity that like loop quantum gravity is background independent. Lee Smolin: Lee Smolin ( ; born June 6, 1955) is an American theoretical physicist, a faculty member at the Perimeter Institute for Theoretical Physics, an adjunct professor of physics at the University of Waterloo and a member of the graduate faculty of the philosophy department at the University of Toronto.
Perimeter Institute for Theoretical Physics