CETUP* 2025

TALK: Probing Primordial Perturbations via CMB B-mode Polarization

Jun 12, 2025, 9:00 AM

45m

Lead-Deadwood Elementary

Description

Author: Tao Xu
Presenter: Tao Xu
Abstract: Primordial perturbations are a central target of cosmological observations, providing critical insights into the early universe and the theory of inflation. We propose using CMB B-mode polarization as a novel probe of curvature perturbations on scales $k\sim 1-100{\mathrm{M}\mathrm{p}\mathrm{c}}^{-1}$, a regime beyond the reach of traditional measurements. I will discuss the gravitational waves induced by primordial perturbations that affect CMB polarization, and the sensitivity of future CMB experiments to this signal.

Presentation materials

PDF_B-mode Primordial Perturbation.pdf