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- Centre National de la Recherche ScientifiqueFR9 papers
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8 papers · 1 filter
Dimensional Reduction of the 5D Kaluza-Klein Geodesic Deviation Equation
V. Lacquaniti, G. Montani, F. Vietri
In the work of Kerner et al. (2001) the problem of the geodesic deviation in a 5D Kaluza Klein background is faced. The 4D space-time projection of the resulting equation coincides…
On Matter Coupling in 5D Kaluza-Klein Model
Valentino Lacquaniti, Giovanni Montani
We analyze some unphysical features of the geodesic approach to matter coupling in a compactified Kaluza-Klein scenario, like the q/m puzzle and the huge massive modes. We propose…
Tensorial Structure of the LQG graviton propagator
Emanuele Alesci
We review the construction of the tensorial structure of the graviton propagator in the context of loop quantum gravity and spinfoam formalism. The main result of this analysis is…
The complete LQG propagator: II. Asymptotic behavior of the vertex
Emanuele Alesci, Carlo Rovelli
In a previous article we have show that there are difficulties in obtaining the correct graviton propagator from the loop-quantum-gravity dynamics defined by the Barrett-Crane vert…
Numerical indications on the semiclassical limit of the flipped vertex
Elena Magliaro, Claudio Perini, Carlo Rovelli
We introduce a technique for testing the semiclassical limit of a quantum gravity vertex amplitude. The technique is based on the propagation of a semiclassical wave packet. We app…
First results of the Noether theorem for Hopf-algebra spacetime symmetries
Giovanni Amelino-Camelia, Giulia Gubitosi, Antonino Marciano +4
We summarize here the first results obtained using a technique we recently developed for the Noether analysis of Hopf-algebra spacetime symmetries, including the derivation of cons…