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Renormalizability of quantum gravity near two dimensions. (English) Zbl 1002.81519

Summary: We study the renormalizability of quantum gravity near two dimensions. Our formalism starts with the tree action which is invariant under the volume preserving diffeomorphism. We identify the BRS invariance which originates from full diffeomorphism invariance. We study the Ward-Takahashi identities to determine the general structure of the counter terms. We prove to all orders that the counter terms can be supplied by the coupling and the wave function renormalization of the tree action. The bare action can be constructed to be of the Einstein action form which ensures full diffeomorphism invariance.

MSC:

81T15 Perturbative methods of renormalization applied to problems in quantum field theory
81T40 Two-dimensional field theories, conformal field theories, etc. in quantum mechanics
83C45 Quantization of the gravitational field
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