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Feynman Rules for Simplicial Gravity
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Feynman Rules for Simplicial Gravity
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We develop the general formalism for performing perturbative diagrammatic expansions in the lattice theory of quantum gravity. The results help establish a precise correspondence between continuum and lattice quantities, and should be a useful guide for non-perturbative studies of gravity. The Feynman rules for Regge's simplicial lattice formulation of gravity are then discussed in detail in two dimensions. As an application, the two-dimensional conformal anomaly due to a $D$-component scalar field is explicitly computed in perturbation theory.
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Cited by 1 Pith paper
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Towards the consistent perturbative expansion in discrete gravity
A mixed finite-difference action plus a principal-value soft synchronous gauge is claimed to make lattice gravity perturbation theory reproduce continuum gravity at small momenta.
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