Polarized backgrounds of relic gravitons

Abstract

The polarizations of the tensor modes of the geometry evolving in cosmological backgrounds are treated as the components of a bispinor whose dynamics follows from an appropriate gauge-invariant action. This novel framework bears a close analogy with the (optical) Jones calculus and leads to a compact classification of the various interactions able to polarize the relic gravitons.

arXiv comment11 pages

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Cited by in corpus (6)

• Effective energy density of relic gravitons
• Large-scale gauge spectra and pseudoscalar couplings
• Effective field theories and inflationary magnetogenesis
• The refractive index of the relic gravitons and the nHz band
• Flat spectra of cosmic gravitons in the nHz and audio bands
• Relic gravitons at intermediate frequencies and the expansion history of the Universe