Cosmological birefringence is derived as an adiabatic noncyclic geometric phase of photons in an axion background, recovering the standard rotation angle βΔφ/M, and an equivalent Tellegen-medium analogue is proposed.
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Cosmological Birefringence and the Geometric Phase of Photons
Cosmological birefringence is derived as an adiabatic noncyclic geometric phase of photons in an axion background, recovering the standard rotation angle βΔφ/M, and an equivalent Tellegen-medium analogue is proposed.