28 citations · 28 across the 1 of their papers we have counts for
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Background-free propagation in loop quantum gravity
Simone Speziale
I review the definition of n-point functions in loop quantum gravity, discussing what has been done and what are the main open issues. Particular attention is dedicated to gauge as…
Area-angle variables for general relativity
Bianca Dittrich, Simone Speziale
We introduce a modified Regge calculus for general relativity on a triangulated four dimensional Riemannian manifold where the fundamental variables are areas and a certain class o…
Physical boundary state for the quantum tetrahedron
Etera R. Livine, Simone Speziale
We consider stability under evolution as a criterion to select a physical boundary state for the spinfoam formalism. As an example, we apply it to the simplest spinfoam defined by…
Linearized dynamics from the 4-simplex Regge action
Bianca Dittrich, Laurent Freidel, Simone Speziale
We study the relation between the hessian matrix of the riemannian Reggae action on a 4-simplex and linearized quantum gravity. We give an explicit formula for the hessian as a fun…
Coupling gauge theory to spinfoam 3d quantum gravity
Simone Speziale
We construct a spinfoam model for Yang-Mills theory coupled to quantum gravity in three dimensional riemannian spacetime. We define the partition function of the coupled system as…
A new spinfoam vertex for quantum gravity
Etera R. Livine, Simone Speziale
We introduce a new spinfoam vertex to be used in models of 4d quantum gravity based on SU(2) and SO(4) BF theory plus constraints. It can be seen as the conventional vertex of SU(2…