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arXiv 2602.01327astro-ph.COgr-qchep-th
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单一场暴胀势能与近期观测一致

A single field inflationary potential consistent with recent observations

Jamia Millia Islamia(贾米亚米利娅伊斯兰大学)

Md. Wali Hossain

AI总结:

该研究提出一种反指数势能模型,通过添加陡峭指数项实现暴胀后再加热,其最大再加热温度约为10^13 GeV,结合理论简洁性与观测可行性。

摘要:

当前观测表明,一个反指数形式的暴胀子势能提供了对单一场暴胀的极佳描述。该势能能够很好地拟合SPA+ BK+ DESI数据集,在n_s-r平面的1σ界限内,从而提供了一个简单且观测上可行的单一场暴胀情景。为了描述暴胀后的发展和再加热,我们通过添加一个陡峭的指数项扩展反指数势能,该项在暴胀期间保持微不足道,但之后变得重要。所得到的完整势能会在暴胀结束之后形成一个极小值,导致标量场的振荡,从而实现宇宙的再加热。我们发现,在这种情况下可达到的最大再加热温度约为10^13 GeV。反指数势能因此成为早期宇宙暴胀的有力候选者,结合了理论上的简洁性与稳健的观测可行性。

英文摘要:

Current observations indicate that an inverse exponential form of the inflaton potential provides an excellent description of single-field inflation. This potential fits the SPA$+$BK$+$DESI data sets well with in the $1σ$ bound in the $n_{\rm s}$-$r$ plane, thereby offering a simple and observationally viable single field inflationary scenario. To describe post-inflationary evolution and reheating, we extend the inverse exponential potential by adding a steep exponential term that remains negligible during inflation but becomes important afterwards. The resulting full potential develops a minimum after the end of inflation, leading to oscillations of the scalar field and consequently reheating of the Universe. We find that the maximum reheating temperature attainable in this scenario is of order $10^{13}\,\mathrm{GeV}$. The inverse exponential potential therefore emerges as a compelling candidate for early-Universe inflation, combining theoretical simplicity with robust observational viability.

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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