Cosmological Birefringence and the Geometric Phase of Photons
arXiv:1908.03337 · doi:10.1016/j.physletb.2019.134841
Abstract
Regarding axion electrodynamics in the background flat FRW universe, we show that cosmological birefringence arises from an adiabatic noncyclic geometric phase that appears in the quantum state of photons because of their interaction with the axion field. We also show that the axion electrodynamics is equivalent to standard electrodynamics in time-dependent bi-isotropic magnetoelectric Tellegen media, which serves as an analogue system that can simulate cosmological birefringence.
arXiv commentTo appear in Phys. Lett. B., 2019
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