Cosmological Birefringence and the Microwave Background
classification
🌀 gr-qc
keywords
anisotropybackgroundmicrowavemodebirefringencecorrelatorcosmologicalcross
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We show that significant anisotropy in electromagnetic propagation generates a distinctive signature in the microwave background. The anisotropy may be determined by looking at the cross correlator of the $E$-mode and $B$-mode polarisation spectrum.
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