Ponente
Marco Regis
(University of Torino and INFN)
Descripción
A cosmological pseudo-scalar field provides a compelling realization of dynamical
dark energy (DE). If its coupling to photons is non-negligible, the cosmic microwave background acquires a rotation of its polarization plane, known as cosmic birefringence. We discuss pseudo-scalar models that can simultaneously account for the recent hints of evolution in the equation of state of DE and of the presence of cosmic birefringence.
Autor primario
Marco Regis
(University of Torino and INFN)
