Polarized backgrounds of relic gravitons

  title={Polarized backgrounds of relic gravitons},
  author={Massimo Giovannini},
  journal={Physical Review D},
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. 
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