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arXiv 2404.18548gr-qc
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论恒定滚动暴胀中的对偶性

On the duality in constant-roll inflation

Yue Wang, Qing Gao, Shengqing Gao, Yungui Gong

AI总结:

本文研究了恒定滚动暴胀中的对偶性,发现在慢滚参数$ε_H$可忽略且小场近似下,暴胀子势保持二次形式,并在$η_H$变为$\arη_H=3-η_H$时不变,同时揭示了原初曲率扰动存在对数对偶性。

摘要:

如果慢滚参数 $ε_H$ 可以忽略不计,在恒定滚动暴胀中,可观测参数 $n_s$、$r$ 与暴胀子势在大小 $η_H$ 之间存在对偶性。通常,$η_H$ 与 $\arη_H$ 之间的对偶性并不适用于暴胀的背景演化。对于 $η_H$ 为常数的恒定滚动暴胀的某些特定解,我们发现在小场近似下,势取二次形式,且当参数 $η_H$ 变为 $\arη_H=3-η_H$ 时该势保持不变。如果标量场很小且 $ε_H$ 的贡献可忽略,我们发现在具有二次势的暴胀模型中,原初曲率扰动存在对数对偶性以及大小 $η_H$ 之间的对偶性。

英文摘要:

There is a duality in the observables $n_s$, $r$ and the inflaton potential between large and small $η_H$ for the constant-roll inflation if the slow-roll parameter $ε_H$ is negligible. In general, the duality between $η_H$ and $\barη_H$ does not hold for the background evolution of the inflation. For some particular solutions for the constant-roll inflation with $η_H$ being a constant, we find that in the small field approximation, the potential takes the quadratic form and it remains the same when the parameter $η_H$ changes to $\barη_H=3-η_H$. If the scalar field is small and the contribution of $ε_H$ is negligible, we find that there exists the logarithmic duality and the duality between large and small $η_H$ for the primordial curvature perturbation in inflationary models with the quadratic potential.

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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