The cosmological constant problem and quantum gravity as gravitized quantum theory

          @misc{ pirsa_PIRSA:25040103,
            doi = {10.48660/25040103},
            url = {https://pirsa.org/25040103},
            author = {Minic, Djordje},
            keywords = {Quantum Gravity},
            language = {en},
            title = {The cosmological constant problem and quantum gravity as gravitized quantum theory},
            publisher = {Perimeter Institute},
            year = {2025},
            month = {apr},
            note = {PIRSA:25040103 see, \url{https://pirsa.org}}
          }
          

Abstract

I will present a calculation of the vacuum energy that reproduces the observed value and that points to a completely new understanding of quantum gravity as gravitized quantum theory. In that context the fixed Born rule becomes dynamical. After a short conceptual background, I will discuss experimental consequences of this new viewpoint involving intrinsic triple and higher order quantum interferences that are impossible in quantum mechanics and quantum field theory. Also, I will indicate how the observed masses of quarks and leptons (including predictions for the neutrino masses) as well as their mixing angles could be understood in the same context. At the very end I also plan to comment on a time-varying dark energy as another prediction of quantum gravity viewed as gravitized quantum theory.
[This talk is based on the following papers: https://arxiv.org/pdf/2212.00901 https://arxiv.org/pdf/2407.06207 https://arxiv.org/pdf/2501.19269 ]