An efficient probe of the cosmological CPT violation

Abstract

We develop an efficient method based on the linear regression algorithm to probe the cosmological CPT violation using the CMB polarisation data. We validate this method using simulated CMB data and apply it to recent CMB observations. We find that a combined data sample of BICEP1 and BOOMERanG 2003 favours a nonzero isotropic rotation angle at $2.3\sigma$ confidence level, ie, $\Delta \alpha =-3.3\pm 1.4$ deg (68% CL) with systematics included.

10 pages, 5 figures, 2 tables. The published version

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• Improved Constraints on Cosmic Birefringence from the WMAP and Planck Cosmic Microwave Background Polarization Data
• Isotropic cosmic birefringence from early dark energy
• Future CMB constraints on cosmic birefringence and implications for fundamental physics
• Planck 2018 constraints on anisotropic birefringence and its cross-correlation with CMB anisotropy
• In-flight polarization angle calibration for LiteBIRD: blind challenge and cosmological implications
• A note on the birefringence angle estimation in CMB data analysis
• The effects on CMB power spectra and bispectra from the polarization rotation and its correlations with temperature and E-polarization
• CMB polarization as a tool to constrain the optical properties of the Universe
• A short review on Quintom dark energy theory