Cosmological magnetic fields from inflation and backreaction
Cosmological magnetic fields from inflation and backreaction
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DOI：
10.1088/1475-7516/2009/12/009
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发表时间：
2009-08
影响因子：
6.4
通讯作者：
S. Kanno;J. Soda;Masa-aki Watanabe
中科院分区：
文献类型：
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作者：
S. Kanno;J. Soda;Masa-aki Watanabe
本文研究了暴胀磁生机制中的逆反应问题。在通常的分析中，假设电磁场的反作用一旦变得重要，就会破坏暴胀。然而，这一假设没有任何理由。因此，我们通过考虑反反应来分析暴胀的磁生作用。相反，天真的期望，我们表明，通货膨胀仍然继续，即使在逆反应开始工作。然而，事实证明，由于逆反应，原始磁场的产生被显著抑制。
We study the backreaction problem in a mechanism of magnetogenesis from inflation. In usual analysis, it has been assumed that the backreaction due to electromagnetic fields spoils inflation once it becomes important. However, there exists no justification for this assumption. Hence, we analyze magnetogenesis from inflation by taking into account the backreaction. On the contrary to the naive expectation, we show that inflation still continues even after the backreaction begins to work. Nevertheless, it turns out that creation of primordial magnetic fields is significantly suppressed due to the backreaction.