Title

Parametrization dependence of the energy-momentum tensor and the metric

Publication Date

2007

Journal or Book Title

PHYSICAL REVIEW D

Abstract

We use results by Kirilin to comment that in general relativity the nonleading terms in the energy-momentum tensor of a particle depends on the parameterization of the gravitational field. The classical observables are parameterization independent after a change in coordinates. The quantum effects that emerge within the same calculation of the metric also depend on the parameterization and a full quantum calculation requires the inclusion of further diagrams. However, within a given parameterization the quantum effects calculated by us in a previous paper are well defined. Flaws of Kirilin’s proposed alternate metric definition are described and we explain why the diagrams that we calculated are the appropriate ones.

Comments

Published version is located at http://prd.aps.org/abstract/PRD/v75/i10/e108502

Volume

75

Pages

-

Issue

10

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