Advancing Field-level and Simulation-based Inference for Cosmology

Probing Cosmology through Higher-Order CMB Lensing Statistics

Jun 11, 2026, 11:00 AM

20m

PI/4-405 - Bob Room (Perimeter Institute for Theoretical Physics)

Contributed Talk

Speaker

Shu-Fan Chen (Columbia University)

Description

We investigate the cosmological information content of higher-order statistics of the CMB lensing convergence field for near-term experiments similar to the Simons Observatory. Using a field-level forward-modeling pipeline based on ray-traced $N$-body simulations with realistic SO-like lensing reconstruction, we measure non-Gaussian statistics such as Minkowski functionals, peak/minima counts, and train emulators to model their dependence on $\Omega_m$, $A_s$, and $M_\nu$. We quantify the information gain beyond the lensing power spectrum and identify which statistics are most robust to reconstruction noise, highlighting the potential of non-Gaussian statistics to enhance cosmological constraints from upcoming CMB surveys.

Presentation materials

slide.pdf

Talk Recording (26060031)

External references

• 26060031
• 9624104c-7529-492d-9396-a41d3f0b2bcb