Euler-Heisenberg Lagrangian and photon circular polarization

Details Euler-Heisenberg Lagrangian and photon circular polarization Euler-Heisenberg Lagrangian and photon circular polarization

2011-04-18

arxiv.org/abs/1104.3555v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages

Scientific paper

Considering the QED effective Euler-Heisenberg Lagrangian, non-linear photon-photon interactions, we study the circular polarization of electromagnetic radiation based on the time-evolution of Stokes parameters. To the leading order, we solve the quantum Boltzmann equation for the density matrix describing an ensemble of photons in the space of energy-momentum and polarization states, and calculate the intensity of circular polarizations. Applying these results to a linear polarized thermal radiation, we calculate the circular polarization intensity, and discuss its possible relevance to the circular polarization intensity of the Cosmic Microwave Background (CMB).

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