Inflationary magnetogenesis with broken local U(1) symmetry
Inflationary magnetogenesis with broken local U(1) symmetry
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DOI：
10.1209/0295-5075/115/19001
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发表时间：
2015-12
期刊：
影响因子：
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通讯作者：
Guillem Domènech;Chunshan Lin;M. Sasaki
中科院分区：
文献类型：
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作者：
Guillem Domènech;Chunshan Lin;M. Sasaki
我们指出，如果在暴胀过程中打破局域U（1）规范对称性，暴胀磁生是可能实现的。有效电荷被固定为一个基本常数，这使我们能够获得一个几乎标度不变的磁谱，避免了强耦合和反反应问题。我们研究了由于这些随机电磁场的原始曲率扰动的修正，发现在线性和非线性顺序，从电磁场的贡献是可以忽略不计的相比，从真空波动。最后，U（1）规范对称性在暴胀结束时恢复。
We point out that a successful inflationary magnetogenesis could be realised if we break the local U(1) gauge symmetry during inflation. The effective electric charge is fixed as a fundamental constant, which allows us to obtain an almost scale-invariant magnetic spectrum avoiding both the strong coupling and back reaction problems. We examine the corrections to the primordial curvature perturbation due to these stochastic electromagnetic fields and find that, at both linear and non-linear orders, the contributions from the electromagnetic field are negligible compared to those created from vacuum fluctuations. Finally, the U(1) gauge symmetry is restored at the end of inflation.