Gravitational birefringence and an exotic formula for redshift

Christian Duval (1, 2) , Johanna Pasquet (3) , Thomas Schucker (2, 4) , Andre Tilquin (3)

1 CPT - E2 Géométrie, Physique et Symétries
2 CPT - Centre de Physique Théorique - UMR 7332
3 CPPM - Centre de Physique des Particules de Marseille
4 CPT - E3 Cosmologie

We compute the birefringence of light in curved Robertson-Walker spacetimes and propose an exotic formula for redshift based on the internal structure of the spinning photon. We then use the Hubble diagram of supernovae to test this formula.

Domaines: Physique des Hautes Energies - Théorie [hep-th]

Christian Duval, Johanna Pasquet, Thomas Schucker, Andre Tilquin. Gravitational birefringence and an exotic formula for redshift. Physical Review D, 2018, 97 (12), pp.123508. ⟨10.1103/PhysRevD.97.123508⟩. ⟨hal-01772665⟩