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arXiv 0911.0896astro-ph.COgr-qchep-phhep-th
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电磁二象性与暴胀磁生的条件

Electric-magnetic duality and the conditions of inflationary magnetogenesis

Massimo Giovannini

摘要:

对规范耦合的早期变化所引发的磁生现象进行了批判性分析。在源的情况下,它示出的电和磁功率谱可以明确地计算通过电磁对偶变换。暴胀前膨胀和再加热过程的残余物通过诱导欧姆电流明确地打破了电磁对偶性。在这类模型中,大尺度磁场的产生以及电磁可观测量之间的物理区别源于等离子体在膨胀后的电导率达到的最终值。给出了具体的数值例子。可行的磁场发生的情况下的物理要求。

英文摘要:

The magnetogenesis scenarios triggered by the early variation of the gauge coupling are critically analyzed. In the absence of sources, it is shown that the electric and magnetic power spectra can be explicitly computed by means of electric-magnetic duality transformations. The remnants of a pre-inflationary expansion and the reheating process break explicitly electric-magnetic duality by inducing Ohmic currents. The generation of large-scale magnetic field and the physical distinction between electric and magnetic observables stems, in this class of models, from the final value reached by the conductivity of the plasma right after inflation. Specific numerical examples are given. The physical requirements of viable magnetogenesis scenarios are spelled out.

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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