Using CMB data to constrain non-isotropic Planck-scale modifications to Electrodynamics
arXiv:1106.6049 · doi:10.1088/1475-7516/2011/11/003
Abstract
We develop a method to constrain non-isotropic features of Cosmic Microwave Background (CMB) polarization, of a type expected to arise in some models describing quantum gravity effects on light propagation. We describe the expected signatures of this kind of anomalous light propagation on CMB photons, showing that it will produce a non-isotropic birefringence effect, i.e. a rotation of the CMB polarization direction whose observed amount depends in a peculiar way on the observation direction. We also show that the sensitivity levels expected for CMB polarization studies by the \emph{Planck} satellite are sufficient for testing these effects if, as assumed in the quantum-gravity literature, their magnitude is set by the minute Planck length.
18 pages, 4 figures, 2 tables
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Cited by in corpus (9)
- The Atacama Cosmology Telescope: Constraints on Cosmic Birefringence
- Is the CMB asymmetry due to the kinematic dipole?
- WMAP 7 year constraints on CPT violation from large angle CMB anisotropies
- Planck 2018 constraints on anisotropic birefringence and its cross-correlation with CMB anisotropy
- Planck constraints on cross-correlations between anisotropic cosmic birefringence and CMB polarization
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