Education
Princeton University. Haverford College.
physicist university professor
Princeton University. Haverford College.
He has conducted research in gauge theory, string theory, instantons, black holes, strong interactions, and many other topics. Callan received his Bachelor of Science in physics from Haverford College. Later he studied physics under Sam Treiman at Princeton and in 1964 received his doctorate degree.
His Doctor of Philosophy students include Philip Argyres, Vijay Balasubramanian, William East. Caswell, Peter Woit, Igor Klebanov, Juan Maldacena, Nathan Myhrvold, and Larus Thorlacius.
Callan is best known for his work on broken scale invariance (Callan–Symanzik equation) and has also made leading contributions to quantum field theory and string theory in the areas of dyon-fermion dynamics, string solitons and black holes. He served as president of the American Physical Society in 2010.
National Academy of Sciences]
Callan has been a member of the JASON defense advisory group since 1968, and was chair of the group from 1990 to 1995.