Speaker
Hugo Simon
(CEA Paris-Saclay)
Description
Field-Level Inference (FLI) needs to be made more tractable and robust at survey scale. To this purpose, I developed fast, differentiable cosmological simulators and introduced a standardized benchmark, showing how to reduce the required model evaluations by orders of magnitude. Building on this, I am working toward FLI constraints on local Primordial Non-Gaussianity (PNG) from DESI. I will show the validation of the pipeline on N-body simulations with HOD-populated galaxies, carefully assessing model fidelity and calibration, progressively incorporating survey realism at the field-level, and in parallel extending the analysis to a multi-probe framework combining galaxy clustering with CMB lensing.
External references
- 26060050
- 275a3ec2-ba6b-4fa4-b6b6-deb77e47716a