The graviton propagator in de Donder gauge on de Sitter background

S. P. Miao, N. C. Tsamis, R. P. Woodard

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)

Abstract

We construct the graviton propagator on de Sitter background in exact de Donder gauge. We prove that it must break de Sitter invariance, just like the propagator of the massless, minimally coupled scalar. Our explicit solutions for its two scalar structure functions preserve spatial homogeneity and isotropy so that the propagator can be used within the larger context of inflationary cosmology; however, it is simple to alter the residual symmetry. Because our gauge condition is de Sitter invariant (although no solution for the propagator can be) renormalization should be simpler using this propagator than one based on a noncovariant gauge. It remains to be seen how other computational steps compare.

Original languageEnglish
Article number122301
JournalJournal of Mathematical Physics
Volume52
Issue number12
DOIs
Publication statusPublished - 2011 Dec 20

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Mathematical Physics

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