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arXiv 1607.07041hep-thastro-ph.COgr-qc
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de Sitter时空中的隐形磁场

Stealth magnetic field in de Sitter spacetime

Shinji Mukohyama

摘要:

在U(1)规范理论与标量-张量引力非极小耦合的背景下,我们找到了一个宇宙吸引子解,它代表了一个具有均匀磁场的de Sitter宇宙。该解充分考虑了磁场对几何形状和标量场的反作用。这样的解决方案是可能的缩放型全球对称性和微调的两个参数的理论。如果微调放松,然后解决方案是变形到一个轴对称的Bianchi I型宇宙的曲率不变,均匀的磁场和均匀的电场。通货膨胀磁的影响进行了简要讨论。

英文摘要:

In the context of a U(1) gauge theory non-minimally coupled to scalar-tensor gravity, we find a cosmological attractor solution that represents a de Sitter universe with a homogeneous magnetic field. The solution fully takes into account backreaction of the magnetic field to the geometry and the scalar field. Such a solution is made possible by scaling-type global symmetry and fine-tuning of two parameters of the theory. If the fine-tuning is relaxed then the solution is deformed to an axisymmetric Bianchi type-I universe with constant curvature invariants, a homogeneous magnetic field and a homogeneous electric field. Implications to inflationary magnetogenesis are briefly discussed.

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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