Physics Beyond the Horizon

          @misc{ scivideos_PIRSA:08010043,
            doi = {10.48660/08010043},
            url = {https://pirsa.org/08010043},
            author = {Afshordi, Niayesh},
            keywords = {Cosmology},
            language = {en},
            title = {Physics Beyond the Horizon},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2008},
            month = {jan},
            note = {PIRSA:08010043 see, \url{https://scivideos.org/pirsa/08010043}}
          }
          

Abstract

The history of human knowledge is often highlighted by our efforts to explore beyond our apparent horizon. In this talk, I will describe how this challenge has now evolved into our quest to understand the physics at/beyond the cosmological horizon, some twenty orders of magnitude above Columbus’s original goal. I also argue why inflationary paradigm predicts the existence of non-trivial physics beyond the cosmological horizon, and how we can use the Integrated Sachs-Wolfe effect in the Cosmic Microwave Background to probe this physics, including the nature of gravity and primordial non-gaussianity on the horizon scale.