Generation of circular polarization of CMB due to the Euler-Heisenberg Lagrangian

Autor:	Motie, Iman
Rok vydání:	2024
Předmět:	High Energy Physics - Theory
Druh dokumentu:	Working Paper
Popis:	It is known that the dominant contribution of primordial anisotropies of Cosmic Microwave Background (CMB) is linearly polarized via Compton scattering. However circular polarization of this anisotropy has not been observed up to now, but it has not been excluded in observational evidence. Here we show that the Euler-Heisenberg Effective Lagrangian can generate circular polarization in CMB. This generation is calculated by using the Quantum Boltzmann Equation for the time evolution of the Stokes parameter. Also, we estimate the Faraday conversion phase in order of $10^{-13} $ due to this Lagrangian which gives a lower bound on circular polarization of CMB. Comment: Canadian Journal of Physics 96 (8), 859-863
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2407.11067 Zobrazit plný text záznamu View this record from Arxiv