James Sullivan

Jamie Sullivan is a cosmologist and Brinson Prize Fellow hosted at the MIT Center for Theoretical Physics. Broadly, he is interested in answering fundamental physics questions using large swaths of the sky.

He currently investigates primordial non-Gaussianity, the statistical imprint of non-standard early universe physics, as it manifests in the large-scale distribution of matter in the universe. Most immediately, he is interested in using high-precision galaxy clustering data from ground- and space-based redshift surveys to constrain the inflationary era. Jamie is also widely interested in numerical methods for modeling the large-scale structure of the universe and its luminous tracers.

Jamie completed his Ph.D. in 2024 with Uroš Seljak in the Berkeley Center for Cosmological Physics where he developed numerical and statistical tools for extracting cosmological information from large-scale structure.

At Berkeley, he was a Department of Energy Computational Science Graduate Fellow as well as an Office of Science Graduate Student Research Awardee and gained expertise with high-performance computing and machine learning techniques. He completed B.S.’s in Astronomy, Physics, and Pure Mathematics at the University of Texas at Austin in 2018, and is originally from Washington, D.C.