NeXus Council

Cyril Creque-Sarbinowski

Cyril Creque-Sarbinowski is a theoretical cosmologist and particle astrophysicist working as a Flatiron Research Fellow at Flatiron Institute’s Center for Computational Astrophysics. Specifically, his research leverages the use of observationally-informed cosmology, in order to uncover insights about the Universe across all scales. Currently, he is developing theoretical and statistical frameworks to probe fundamental questions related to inflation, the dark sector, and baryogenesis, alongside other phenomena beyond the Standard Model of physics. He will be an assistant professor at Pomona College beginning Fall 2026.

Delilah Gates

Delilah Gates is a theoretical physicist specializing in general relativity. She is a Future Faculty Leaders Fellow at the Center for Astrophysics | Harvard & Smithsonian and Visiting Scholar of the Black Hole Initiative at Harvard University. Her research focuses on developing analytic and semi-analytic methods for constraining properties of black holes by leveraging features of black hole spacetime geometries such as spacetime symmetries.

Jahmour Givans

Jahmour Givans is a cosmologist who holds appointments as a Flatiron Research Fellow at Flatiron Institute’s Center for Computational Astrophysics and a Guest Researcher in the Department of Astrophysical Sciences at Princeton University. His primary focus concerns creating accurate models to describe signals of interest in cosmological data from upcoming surveys, and their noise/contaminants, to determine whether the standard cosmological model requires small tweaks or a complete overhaul. He has recently been working on methods to extract cosmological constraints from point-cloud data using graphs. He will be an assistant professor at the University of Cincinnati beginning Fall 2025.

Olivier Simon

Olivier Simon is a theoretical physicist specializing in particle phenomenology, and currently holds a Princeton Center for Theoretical Physics postdoctoral fellowship. His interest is primarily in extensions to the Standard Model which predict new particles and their cosmological, astrophysical, and laboratory probes. He has published work on cosmologies with varying fundamental constants, probes of axions and axion-like particles, black hole superradiance, gravitational generation of dark sectors, and the cosmology of theories with multiple axion-like particles.