Title

Parametrization dependence of the energy-momentum tensor and the metric

Publication Date

2007

Comments

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

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.

Pages

-

Volume

75

Issue

10

Journal Title

PHYSICAL REVIEW D