Researchers present emulators for the one- and two-loop cold dark matter power spectrum in the Effective Field Theory of Large Scale Structures, built with symbolic regression. They achieve errors below 0.5% within the EFT validity range, evaluate in under about 5×10^-4 seconds on one core, and leave counterterm time-dependence unspecified for flexible fitting.

— via arXiv — Astro-ph, Despoina Farakou, Constantinos Skordis