Photon helicity and quantum anomalies in curved spacetimes
arXiv:2012.02583 · doi:10.1007/s10714-021-02817-z
Abstract
We compare several definitions of photon helicity (magnetic, electric, electromagnetic) present in literature. In curved spacetime quantum anomalies can spoil helicity conservation inducing, according to these definitions, different effects on photons: either rotation of linear polarization or production of circular polarization. We derive the Noether current associated with duality transformations starting from manifestly invariant Lagrangians.
Accepted for publication in General Relativity and Gravitation: changed to correspond to the proof-read version
References in corpus (6)
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Cited by in corpus (5)
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- Helicity, chirality and spin of optical fields without vector potentials
- Chiral anomalies in black hole spacetimes
- Photon frequency variation in non-linear electro-magnetism