Curvature correlators in nonperturbative 2D Lorentzian quantum gravity

APA

Loll, R. (2024). Curvature correlators in nonperturbative 2D Lorentzian quantum gravity. Perimeter Institute for Theoretical Physics. https://pirsa.org/24040110

MLA

Loll, Renate. Curvature correlators in nonperturbative 2D Lorentzian quantum gravity. Perimeter Institute for Theoretical Physics, Apr. 24, 2024, https://pirsa.org/24040110

BibTex

          @misc{ scivideos_PIRSA:24040110,
            doi = {10.48660/24040110},
            url = {https://pirsa.org/24040110},
            author = {Loll, Renate},
            keywords = {Quantum Gravity},
            language = {en},
            title = {Curvature correlators in nonperturbative 2D Lorentzian quantum gravity},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2024},
            month = {apr},
            note = {PIRSA:24040110 see, \url{https://scivideos.org/pirsa/24040110}}
          }
          

Renate Loll Radboud Universiteit Nijmegen

Source RepositoryPIRSA
Collection

Abstract

Correlation functions are ubiquitous in quantum field theory, but their use in quantum gravity beyond perturbative and asymptotically flat regimes has been limited, due to difficulties with diffeomorphism invariance and the dynamical nature of geometry. We address these challenges in the context of nonperturbative quantum gravity, motivated by the goal of computing geometric correlators from first principles, as a possible window to early-universe cosmology. I will report on recent work in 2D Lorentzian quantum gravity, formulated in terms of causal dynamical triangulations, which demonstrates the feasibility of constructing and measuring manifestly diffeomorphism-invariant curvature correlators. I will discuss some unusual features of the connected correlators and new results on their behaviour in two dimensions, obtained with the help of Monte Carlo simulations.

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