2 papers
gr-qc2024
You shall not pass! -- explicit diffeomorphism violation "no-go" constraints and discontinuities
Quentin G. Bailey, Kellie O'Neal-Ault, Nils A. Nilsson
This paper collects several results in the study of the explicit symmetry-breaking limit of the effective-field theory (EFT) description of diffeomorphism and local Lorentz-symmetr…
astro-ph.CO2023
Reexamining aspects of spacetime-symmetry breaking with CMB polarization
Nils A. Nilsson, Christophe Le Poncin-Lafitte
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 an…