Expansion Thresholds for the Stability of Cosmological Fluids

Explore the stability of cosmological fluids in expanding universes through this 17-minute conference talk delivered at the Erwin Schrödinger International Institute for Mathematics and Physics. Delve into the modeling of the universe's matter content using relativistic fluids with linear equations of state. Examine the contrast between classical solutions breaking down in Minkowski backgrounds and the rapid stabilization of fluids in FLRW spacetimes with positive cosmological constants. Discover recent progress in the field, including a threshold for the stability of homogeneous fluid states based on expansion rates. Learn about the collaborative research efforts with David Fajman, Maciej Maliborski, Todd Oliynyk, and Zoe Wyatt, contributing to the understanding of nonlinear waves and relativity in cosmology.