144 citations · 554 across the 11 of their papers we have counts for
4 papers · 1 filter
Lorentz Violation and Ultrahigh-Energy Photons
Matteo Galaverni, Guenter Sigl
The propagation of photons, electrons and positrons at ultra-high energies above 10^{19} eV can be changed considerably if the dispersion relations of these particles are modified…
Rotation of Linear Polarization Plane and Circular Polarization from Cosmological Pseudoscalar Fields
Fabio Finelli, Matteo Galaverni
We discuss the rotation of the linear polarization plane and the production of circular polarization generated by a pseudoscalar field acting as dark matter. We compute analyticall…
Lorentz Violation for Photons and Ultra-High Energy Cosmic Rays
Matteo Galaverni, Guenter Sigl
Lorentz symmetry breaking at very high energies may lead to photon dispersion relations of the form omega^2=k^2+xi_n k^2(k/M_Pl)^n with new terms suppressed by a power n of the Pla…
Light Bending as a Probe of the Nature of Dark Energy
Fabio Finelli, Matteo Galaverni, Alessandro Gruppuso
We study the bending of light for static spherically symmetric (SSS) space-times which include a dark energy contribution. Geometric dark energy models generically predict a correc…