Matias Zaldarriaga is a theoretical physicist best known for his work on cosmology.
He has made significant contributions toward understanding both astrophysical phenomena and fundamental physics, most notably through his research on modeling the early universe and analyzing statistical properties of cosmic microwave background data.
[5] Born in Coghlan neighbourhood, Buenos Aires, at the present time he works in the Institute for Advanced Study located in Princeton, New Jersey, United States.
Together with Uros Seljak, he developed the CMBFAST code, the first computationally efficient method for computing the anisotropy of the CMB for an arbitrary set of cosmological parameters.
[7] Zaldarriaga was awarded the 2021 Gruber Prize in Cosmology jointly with Uroš Seljak and Marc Kamionkowski, who together "introduced numerous techniques for the study of the large-scale structure of the universe as well as the properties of its first instant of existence.