arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.03939hep-thastro-ph.COgr-qchep-ph
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模宇宙学中的有限温度效应

Finite temperature effects in modular cosmology

Diego Gallego

摘要:

我们重温宇宙学的历史中存在的光模量,包括可能的热效应的标量势。众所周知的宇宙学模量问题考虑的是由于膨胀过程中与最终位置不对准而存储在模量中的初始能量。我们表明,有限的温度修正的标量势,在一般情况下,诱导类似的效果,这些都有可能克服的错位。这会以依赖于模型的方式改变重要参数,如充气期间e折叠数量的首选窗口和最终再加热温度。一般的影响是一个较长的后期模量主导的时代和较大的最终再加热温度。我们探讨所有讨论的元素在IIB型超弦大体积紧致与凯勒暴胀的情况下,零温度的结果是已知的。不稳定性分析,使用Floquet的方法,也进行了明确的情况下,发现强有力的迹象,可能产生周围的一个几乎普遍的归一化临界温度,其中Floquet指数表现出发散行为。

英文摘要:

We revisit the cosmological history in the presence of light moduli by including possible thermal effects in the scalar potential. The well known cosmological moduli problem regards initial energy stored in the moduli due to a misalignment from its final position during inflation. We show that finite temperature corrections to the scalar potential, in general, induce similar effects and these are likely to overcome the ones from the misalignment. This changes important parameters like the preferred window for the numbers of e-fold during inflation and the final reheating temperature in a model-dependent manner. The general implications are a longer late modulus dominated epoch and a larger final reheating temperature. We explore all the discussed elements in type-IIB superstring Large Volume Compactification with a Kähler inflationary scenario, where zero temperature results are known. An instability analysis, using a Floquet approach, is also performed for this explicit case finding strong indications of possible oscillon production around a nearly universal normalized critical temperature, where the Floquet exponents show a divergent behaviour.

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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