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arxiv: gr-qc/0604044 · v2 · submitted 2006-04-10 · 🌀 gr-qc · hep-ph· hep-th

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Graviton propagator in loop quantum gravity

Eugenio Bianchi , Leonardo Modesto , Carlo Rovelli , Simone Speziale
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classification 🌀 gr-qc hep-phhep-th
keywords gravitongravitylooppropagatorquantumsomecomponentscompute
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We compute some components of the graviton propagator in loop quantum gravity, using the spinfoam formalism, up to some second order terms in the expansion parameter.

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  1. Toller matrices and the Feynman $i\varepsilon$ in spinfoams

    gr-qc 2026-04 unverdicted novelty 7.0

    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...