Andreas Kronfeld is a theoretical physicist at Fermilab. He received his PhD in 1985 from Cornell University, studying under G. Peter Lepage. From 1985–1988 he was a postdoctoral researcher at the Deutsches Elektronen Synchrotron in Hamburg, Germany. He has been at Fermilab since 1988, first as a postdoc and since 1989 as a staff member. In 1996, Kronfeld spent three months in Copenhagen as Visiting Scientist at NORDITA. In 2001, he spent three months as a Foreign Professor at Tsukuba University, Japan. In 2014, he was awarded a Hans Fischer Senior Fellowship at the Institute for Advanced Study of the Technische Universität München.
He has been very active in developing the numerical technique of lattice gauge theory (a formulation of quantum field theory) and applying it to problems needed to interpret experiments in elementary particle physics. For these efforts, he has been elected Fellow of the American Physical Society (2002) and of the American Association for the Advancement of Science (2013).
During his career, he has also been active in examining the physics opportunities of possible future particle accelerators, such as e+e− colliders (e.g., ILC) and high-intensity proton linacs (e.g., Project X).