Me inside Jesuss Rafael Soto's 'Penetrable BBL Blue 2/8' at the Perez Art Museum in Miami

Theo Johnson-Freyd

Perimeter Institute for Theoretical Physics

Brief bio

My research focuses on "homotopical physics": the interplay between mathematical physics (particularly quantum field theory) and higher (aka categorical) algebra. Other buzzwords that describe my work: higher symmetries, topological field theory, phases of condensed matter, "moonshine" phenoma, perturbative quantization, categories, representation theory, and algebraic topology. For more details, see my publications and seminar presentations. For fewer details, see my Curriculum Vitae (PDF), which is a bit out of date and contains a strict subset of the information on this website.

I received my PhD from UC Berkeley in 2013, under the supervision of Nicolai Reshetikhin. I was then an NSF postdoc and Boas Assistant Professor at Northwestern University. I am now a Senior Postdoctoral Fellow at the Perimeter Institute. My postdoc mentors are Kevin Costello and Davide Gaiotto. Other collaborators include Alex Chirvasitu, Owen Gwilliam, Claudia Scheimbauer, and David Treumann.

Graduate students: Jessica Weitbrecht (MSc).

I used to be a dancer. Maybe I will be again. I choreographed the 2007 Stanford Viennese Ball opening ceremonies.

My husband and I are avid cooks. Unless you are immediate family, I will not cater your wedding cake.