# 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.
2 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

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