A 2020s Vision of CMB Lensing


Millea, M. (2021). A 2020s Vision of CMB Lensing. Perimeter Institute. https://pirsa.org/21020012


Millea, Marius. A 2020s Vision of CMB Lensing. Perimeter Institute, Feb. 02, 2021, https://pirsa.org/21020012


          @misc{ pirsa_21020012,
            doi = {},
            url = {https://pirsa.org/21020012},
            author = {Millea, Marius},
            keywords = {Cosmology},
            language = {en},
            title = {A 2020s Vision of CMB Lensing},
            publisher = {Perimeter Institute},
            year = {2021},
            month = {feb},
            note = {PIRSA:21020012 see, \url{https://pirsa.org}}


With much of the cosmological information in the primary CMB having already been mined, the next decade of CMB observations will revolve around the secondary CMB lensing effect, which will touch nearly all aspects of observation in some way. At the same time, the increasingly low noise levels of these future observations will render existing "quadratic estimator" methods for analyzing CMB lensing obsolete. This leaves us in an exciting place where new methods need to be developed to fully take advantage of the upcoming generation of CMB data just on our doorstep. I will describe my work developing such new lensing analysis tool, made possible by Bayesian methods, modern statistical techniques, and borrowing ideas from machine learning. I will present the recent first-ever application of such methods to data (from the South Pole Telescope; https://arxiv.org/abs/2012.01709) and discuss prospects for this analysis in the future with regards to not just lensing but also primordial B modes, reionization, and extragalactic foreground fields.