Graviton loop corrections to vacuum polarization in de Sitter in a general covariant gauge

D. Glavan, S. P. Miao, Tomislav Prokopec, R. P. Woodard

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

We evaluate the one-graviton loop contribution to the vacuum polarization on de Sitter background in a 1-parameter family of exact, de Sitter invariant gauges. Our result is computed using dimensional regularization and fully renormalized with Bogoliubov, Parasiuk, Hepp and Zimmerman counterterms, which must include a noninvariant owing to the time-ordered interactions. Because the graviton propagator engenders a physical breaking of de Sitter invariance two structure functions are needed to express the result. In addition to its relevance for the gauge issue this is the first time a covariant gauge graviton propagator has been used to compute a noncoincident loop. A number of identities are derived which should facilitate further graviton loop computations.

Original languageEnglish
Article number195014
JournalClassical and Quantum Gravity
Volume32
Issue number19
DOIs
Publication statusPublished - 2015 Sept 15

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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