PIRSA:12110065

Canonical tensor models with local time

Sasakura, N. (2012). Canonical tensor models with local time. Perimeter Institute. https://pirsa.org/12110065

Sasakura, Naoki. Canonical tensor models with local time. Perimeter Institute, Nov. 15, 2012, https://pirsa.org/12110065 

          @misc{ pirsa_PIRSA:12110065,
            doi = {10.48660/12110065},
            url = {https://pirsa.org/12110065},
            author = {Sasakura, Naoki},
            keywords = {Quantum Gravity},
            language = {en},
            title = {Canonical tensor models with local time},
            publisher = {Perimeter Institute},
            year = {2012},
            month = {nov},
            note = {PIRSA:12110065 see, \url{https://pirsa.org}}
          }

Naoki Sasakura Yukawa Institute for Theoretical Physics

DOI 10.48660/12110065
Collection
Talk Type Scientific Series
Subject

Abstract

Tensor models are generalization of matrix models, and are studied as discrete models for quantum gravity for more than two-dimensions. Among them, the rank-three tensor models can be interpreted as theories of dynamical fuzzy spaces, and they generally have the feature of
respecting symmetries. In this talk, after briefly reviewing some results on Euclidean models such as spontaneous generation of fuzzy spaces and Euclidean general relativity respecting the diffeomorphism symmetry on them, I will present a way to introduce “local” time to the rank-three tensor models by constructing “local” Hamiltonians. The consistency among the multiple ways of local time evolutions is guaranteed by the on-shell closure of the constraint algebra among the
local Hamiltonians and the symmetry generators of the tensor models. The constraint algebra is shown to approach the DeWitt algebra in a formal continuum limit. I will also discuss the two-fold uniqueness of the local Hamiltonians, and will briefly show some preliminary results on the quantization.