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arXiv 1104.3555hep-ph
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欧拉-海森堡拉格朗日量与光子圆偏振

Euler-Heisenberg Lagrangian and photon circular polarization

Iman Motie, She-Sheng Xue

摘要:

考虑有效欧拉-海森堡拉格朗日量,即,在非线性光子-光子相互作用的基础上,基于Stokes参量的时间演化,研究了电磁辐射的圆偏振特性。在第一阶,我们求解了描述光子系综的密度矩阵的量子Boltzmann方程,并计算了圆偏振的强度。将这些结果应用于线偏振热辐射,计算了圆偏振强度,并讨论了它与宇宙微波背景辐射圆偏振强度的可能关系。

英文摘要:

Considering the effective Euler-Heisenberg Lagrangian, i.e., 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 radiation.

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