Photon-spin-dependent contribution to the P,T -odd Faraday rotation effect for atoms

Abstract

The photon-spin-dependent (PS) contribution to the ordinary Faraday effect—optical rotation in an external magnetic field H ⃗ is well known. This contribution is proportional to factor ( s ⃗ p h ⋅ H ⃗ ) where s ⃗ p h is the photon spin. Recently a P , T -odd Faraday effect—optical rotation in an external electric field E ⃗ —was discussed as a promising tool for observation of the electron electric dipole moment in the intra-cavity absorption spectroscopy. In the present paper, we introduce the PS contribution to the P , T -odd Faraday rotation effect. This contribution is proportional to ( s ⃗ p h ⋅ E ⃗ ) and has to be taken into account in the calculations of the P , T -odd Faraday effect.