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arXiv 1704.04750astro-ph.HEhep-ph
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中子X射线发射中的非线性QED效应

Nonlinear QED effects in X-ray emission of pulsars

Soroush Shakeri, Mansour Haghighat, She-Sheng Xue

摘要:

在强磁场存在下,由于非线性QED相互作用,QED真空成为双折射介质。在这里,我们探讨了有效的光子-光子相互作用对光子通过脉冲星的磁化QED真空传播的偏振演化的影响。我们在欧拉-海森堡拉格朗日量的框架内求解量子玻尔兹曼方程,得到斯托克斯参数的演化。我们发现,线偏振的X射线光子在旋转的中子星的磁层中向外传播可以获得高的圆偏振参数值。同时,研究表明,除了光子能量外,光子的偏振特性还强烈地依赖于磁介质的参数,如磁场强度、倾角和旋转周期。我们的结果是明确的预测QED真空极化效应在附近的磁星,可以测试与即将到来的X射线偏振观测。

英文摘要:

In the presence of strong magnetic fields near pulsars, the QED vacuum becomes a birefringent medium due to nonlinear QED interactions. Here, we explore the impact of the effective photon-photon interaction on the polarization evolution of photons propagating through the magnetized QED vacuum of a pulsar. We solve the quantum Boltzmann equation within the framework of the Euler-Heisenberg Lagrangian to find the evolution of the Stokes parameters. We find that linearly polarized X-ray photons propagating outward in the magnetosphere of a rotating neutron star can acquire high values for the circular polarization parameter. Meanwhile, it is shown that the polarization characteristics of photons besides photon energy depend strongly on parameters of the pulsars such as magnetic field strength, inclination angle and rotational period. Our results are clear predictions of QED vacuum polarization effects in the near vicinity of magnetic stars which can be tested with the upcoming X-ray polarimetric observations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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