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arXiv 1806.02533gr-qcastro-ph.CO
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宇宙学Coleman-Weinberg势与暴胀

Cosmological Coleman-Weinberg Potentials and Inflation

Z. H. Liao, S. P. Miao, R. P. Woodard

摘要:

我们考虑一个额外的微调问题,折磨标量驱动模型的通货膨胀。问题是,成功的再加热需要暴胀子与普通物质耦合,而这种物质的量子涨落会产生非普朗克抑制的科尔曼-温伯格势。不像平坦空间的情况下,这些潜力取决于一个仍然未知的,非本地功能的度量,减少到哈勃参数德西特。这样一种电位不能被任何局部作用完全抵消。在一个简单的模型中,我们在数值上考虑一种可能的减法方案,其中在膨胀开始时局部减去校正。对费米子来说,其效果是使宇宙以较小的哈勃参数接近德西特。对规范玻色子来说,除非规范荷小得令人无法接受,否则它的作用是使暴胀几乎立即结束。

英文摘要:

We consider an additional fine-tuning problem which afflicts scalar-driven models of inflation. The problem is that successful reheating requires the inflaton be coupled to ordinary matter, and quantum fluctuations of this matter induces Coleman-Weinberg potentials which are not Planck-suppressed. Unlike the flat space case, these potentials depend upon a still-unknown, nonlocal functional of the metric which reduces to the Hubble parameter for de Sitter. Such a potential cannot be completely subtracted off by any local action. In a simple model we numerically consider one possible subtraction scheme in which the correction is locally subtracted at the beginning of inflation. For fermions the effect is to make the universe approach de Sitter with a smaller Hubble parameter. For gauge bosons the effect is to make inflation end almost instantly unless the gauge charge is unacceptably small.

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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