arXiv 2103.018752021-03-02gr-qcastro-ph.CO

与GW170817相容的对数修正Einstein-Gauss-Bonnet暴胀

Logarithmic corrected Einstein-Gauss-Bonnet inflation compatible with GW170817

S. A. Venikoudis, F. P. Fronimos

摘要：

本文研究了与GW 170817事件相一致的Einstein-Gauss-Bonnet理论在对数修正的$f(R)$引力下的膨胀现象。我们的主要工作是研究几乎线性的Ricci标量通过对数修正的不同结果，并检验这种模型是否可行。首先，给出了标量场慢滚演化的理论框架，并发展了常滚演化的形式，对模型的非高斯性进行了预测，因为常滚演化可以增强非高斯性。如图所示，非高斯性具有$\mathcal{O}\sim(10^{-1})$的量级。此外，慢滚指数和通货膨胀的观测指数，计算了几个模型的利益。正如所示，现象学的可行性的模型在手实现了广泛的自由参数和对数项的数值计算，如预期的有轻微的贡献。

英文摘要：

In this paper we investigate the inflationary phenomenology of an Einstein-Gauss-Bonnet theory with the extension of a logarithmic modified $f(R)$ gravity, compatible with the GW170817 event. The main idea of our work is to study different results for an almost linear Ricci scalar through logarithmic corrections and examine whether such model is viable. First of all, the theoretical framework under slow-roll evolution of the scalar field is presented and also developed the formalism of the constant-roll evolution making predictions for the non- Gaussianities of the models is developed , since the constant-roll evolution is known to enhance non-Gaussianities. As shown, the non-Gaussianities are of the order $\mathcal{O}\sim(10^{-1})$. Furthermore, the slow-roll indices and the observational indices of inflation, are calculated for several models of interest. As demonstrated, the phenomenological viability of the models at hand is achieved for a wide range of the free parameters and the logarithmic term has a minor contribution to numerical calculations, as expected.

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。

摘要：

英文摘要：

相关论文