Applying the Fröhlich-Morchio-Strocchi mechanism to canonical quantum gravity shows that ordinary particles emerge as the leading-order part of diffeomorphism-invariant, gravitationally dressed operators when gravitational fluctuations are small.
de Sitter gravity from lattice gauge theory
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abstract
We investigate a lattice model for Euclidean quantum gravity based on discretization of the Palatini formulation of General Relativity. Using Monte Carlo simulation we show that while a naive approach fails to lead to a vacuum state consistent with the emergence of classical spacetime, this problem may be evaded if the lattice action is supplemented by an appropriate counter term. In this new model we find regions of the parameter space which admit a ground state which can be interpreted as (Euclidean) de Sitter space.
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The Fr\"ohlich-Morchio-Strocchi mechanism and quantum gravity
Applying the Fröhlich-Morchio-Strocchi mechanism to canonical quantum gravity shows that ordinary particles emerge as the leading-order part of diffeomorphism-invariant, gravitationally dressed operators when gravitational fluctuations are small.