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- W4292245197 abstract "A birefringent universe could show itself through a rotation of the plane of polarisation of the cosmic microwave background photons. This is usually investigated using polarisation $B$ modes, which is degenerate with miscalibration of the orientation of the polarimeters. Here we point out an independent method for extracting the birefringence angle using only temperature and $E$-mode signals. We forecast that, with an ideal cosmic-variance-limited experiment, we could constrain a birefringence angle of $0.3^circ$ with $3,sigma$ statistical significance, which is close to the current constraints using $B$ modes. We explore how this method is affected by the systematic errors introduced by the polarisation efficiency. In the future, this could provide an additional way of checking any claimed $B$-mode derived birefringence signature." @default.
- W4292245197 created "2022-08-19" @default.
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- W4292245197 date "2022-08-01" @default.
- W4292245197 modified "2023-10-14" @default.
- W4292245197 title "Constraints on cosmic birefringence using E-mode polarisation" @default.
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- W4292245197 doi "https://doi.org/10.1088/1475-7516/2022/08/033" @default.
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