Graviton propagator in loop quantum gravity
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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.
7 Figures and Tables
Table 1: Terminology
Figure 1: The boundary graph Γ and the boundary spin network s.
Figure 2: The spacetime triangulation ∆ together with its 3d and 2d analogs.
Figure 3: The spacetime triangulation.
Figure 4: Decomposition
Figure 5: On the left, the triangulated spacetime. On, the right, its dual drawn around the Feynman graph.
Figure 6: Central tetrahedron (a). Lateral tetrahedron (b).
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