PIRSA:25060032

Video URL

https://pirsa.org/25060032

Cosmology, Quantum Gravity and a Constant

Alexander, S. (2025). Cosmology, Quantum Gravity and a Constant. Perimeter Institute for Theoretical Physics. https://pirsa.org/25060032

Alexander, Stephon. Cosmology, Quantum Gravity and a Constant. Perimeter Institute for Theoretical Physics, Jun. 02, 2025, https://pirsa.org/25060032 

          @misc{ scivideos_PIRSA:25060032,
            doi = {10.48660/25060032},
            url = {https://pirsa.org/25060032},
            author = {Alexander, Stephon},
            keywords = {},
            language = {en},
            title = {Cosmology, Quantum Gravity and a Constant},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2025},
            month = {jun},
            note = {PIRSA:25060032 see, \url{https://scivideos.org/index.php/pirsa/25060032}}
          }

Stephon Alexander Brown University

Talk numberPIRSA:25060032
DOI10.48660/25060032
Source RepositoryPIRSA
Collection
Talk Type Conference

Abstract

Cosmological data is consistent with a positive cosmological constant. In this talk I discuss an approach pioneered by Smolin that uses a non-perturbative exact quantization of gavity with a cosmological constant in the Ashtekar formalism. I discuss follow up work by the Author and his collaborators that address some conceptual and potential physical predictions of this approach. I end with a discussion of Smolin's cosmic natural selection as a predictive mechanism which also had consequences in particular Anthrophic landscape realizations in string theory.