Polarized backgrounds of relic gravitons

@article{Giovannini2019PolarizedBO,
  title={Polarized backgrounds of relic gravitons},
  author={Massimo Giovannini},
  journal={Physical Review D},
  year={2019}
}
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. 
3 Citations

Effective energy density of relic gravitons

The energy density, the pressure and the anisotropic stress of the relic gravitons do not have a unique gauge-invariant and frame-invariant expression since the equivalence principle ultimately

Primordial backgrounds of relic gravitons

Flat spectra of cosmic gravitons in the nHz and audio bands

  • M. Giovannini
  • Physics
    Journal of Cosmology and Astroparticle Physics
  • 2022
The spectra of the relic gravitons are customarily normalized in the low-frequency domain where the signal of the concordance paradigm is expected to peak and this is why their contribution to the

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