Phys. Rev. D 56, 7779–7787 (1997)Geodesics, gravitons, and the gauge-fixing problemReceived 19 August 1997; published in the issue dated 15 December 1997 When graviton loops are taken into account, the background metric obtained as a solution to the one-loop corrected Einstein equations turns out to be gauge-fixing dependent. Therefore it is of no physical relevance. Instead we consider a physical observable, namely, the trajectory of a test particle in the presence of gravitons. We derive a quantum corrected geodesic equation that includes backreaction effects and is explicitly independent of any gauge-fixing parameter. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.56.7779
DOI:
10.1103/PhysRevD.56.7779
PACS:
04.60.-m, 11.15.Kc
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