PIRSA:15080115 Scientific Series Quantum Gravity

DOI10.48660/15080115

Series: Quantum Gravity

Miao, S. (2015). Electrodynamic Effects of Inflationary Gravitons. Perimeter Institute. https://pirsa.org/15080115

Miao, Shun-Pei. Electrodynamic Effects of Inflationary Gravitons. Perimeter Institute, Aug. 13, 2015, https://pirsa.org/15080115 

@misc{ pirsa_PIRSA:15080115,
  doi = {10.48660/15080115},
  url = {https://pirsa.org/15080115},
  author = {Miao, Shun-Pei},
  keywords = {Quantum Gravity},
  language = {en},
  title = {Electrodynamic Effects of Inflationary Gravitons},
  publisher = {Perimeter Institute},
  year = {2015},
  month = {aug},
  note = {PIRSA:15080115 see, \url{https://pirsa.org}}
}

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 BPHZ 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.

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