Primordial fluctuations from quantum gravity: 16-cell topological model
Reviewed by Pithpith:J3P3GLR7open to challenge →
read the original abstract
We present a numerical analysis of an Hartle-Hawking state for the early universe, in the deep quantum regime, computed using the covariant Loop Quantum Gravity formalism, in a truncation defined by 16-cell and in a simplified case where the dynamics is defined by SU(2) BF theory. We compute mean geometry, fluctuations and correlations. The results are consistent with the hypothesis that refining the triangulation does not affect the global physical picture substantially.
This paper has not been read by Pith yet.
Forward citations
Cited by 3 Pith papers
-
Toller matrices and the Feynman $i\varepsilon$ in spinfoams
Toller matrices T^(±) in causal spinfoam amplitudes satisfy T^(+) + T^(-) = D and admit equivalent definitions via analyticity, iε prescription, and boost-eigenvalue integrals that reproduce the Euclidean-to-Lorentzia...
-
A class of entangled and diffeomorphism-invariant states in loop quantum gravity: Bell-network states
Bell-network states are diffeomorphism-invariant entangled states in LQG with area-law entanglement entropy, characterized on dipole graphs as representing homogeneous isotropic quantum geometries.
-
Spinfoams, $\gamma$-duality and parity violation in primordial gravitational waves
γ-duality in the EPRL spinfoam model determines the relation between parity-even and parity-odd terms in an effective gravity theory, allowing the Barbero-Immirzi parameter to be measured from inflationary tensor observables.
discussion (0)
Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.