Reexamining aspects of spacetime-symmetry breaking with CMB polarization
Reexamining aspects of spacetime-symmetry breaking with CMB polarization
The linear polarization of the Cosmic Microwave Background (CMB) is highly sensitive to parity-violating physics at the surface of last scattering, which might cause mixing of E and B modes, an effect known as {\it cosmic birefringence}. This has until recently been problematic to detect due to its degeneracy with …