Video URL

https://pirsa.org/22100104

The reconstruction of the CMB lensing bispectrum

Kalaja, A. (2022). The reconstruction of the CMB lensing bispectrum. Perimeter Institute for Theoretical Physics. https://pirsa.org/22100104

Kalaja, Alba. The reconstruction of the CMB lensing bispectrum. Perimeter Institute for Theoretical Physics, Oct. 11, 2022, https://pirsa.org/22100104 

          @misc{ scivideos_PIRSA:22100104,
            doi = {10.48660/22100104},
            url = {https://pirsa.org/22100104},
            author = {Kalaja, Alba},
            keywords = {Cosmology},
            language = {en},
            title = {The reconstruction of the CMB lensing bispectrum},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2022},
            month = {oct},
            note = {PIRSA:22100104 see, \url{https://scivideos.org/pirsa/22100104}}
          }

Alba Kalaja University of Groningen

DOI 10.48660/22100104
Source Repository PIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

Weak gravitational lensing by the intervening large-scale structure (LSS) of the Universe is the leading non-linear effect on the anisotropies of the cosmic microwave background (CMB). The integrated line-of-sight gravitational potential that causes the distortion can be reconstructed from the lensed temperature and polarization anisotropies via estimators quadratic in the CMB modes. While previous studies have focused on the lensing power spectrum, upcoming experiments will be sensitive to the bispectrum of the lensing field, sourced by the non-linear evolution of structure. The detection of such a signal would provide additional information on late-time cosmological evolution, complementary to the power spectrum.

Zoom link: https://pitp.zoom.us/j/94880169487?pwd=dzRWcVRwQ2dVdWZ3N2RjOWU2RDUyZz09