论文标题
g通货膨胀的原始非高斯性
Primordial Non-Gaussianity from G-inflation
论文作者
论文摘要
关于相互作用的巨大信息包含在原始曲率扰动的非高斯，这对于打破通货膨胀模型的堕落至关重要。我们研究原始双光谱，用于G通货膨胀模型，可预测原始标量功率谱系中的尖峰和宽峰。我们在等边限制中计算非高斯参数$ f _ {\ mathrm {nl}} $，并以数值为单位挤压限制，并确认一致性关系在这些模型中存在。即使$ f _ {\ mathrm {nl}} $在功率谱达到峰值之前的尺度上变得很大，并且功率谱中有摇摆的尺度，在峰值尺度上，它仍然很小。因此，预计非高斯对标量诱导的次级引力波和原始黑洞丰度的贡献预计可以忽略不计。
Enormous information about interactions is contained in the non-Gaussianities of the primordial curvature perturbations, which are essential to break the degeneracy of inflationary models. We study the primordial bispectra for G-inflation models predicting both sharp and broad peaks in the primordial scalar power spectrum. We calculate the non-Gaussianity parameter $f_{\mathrm{NL}}$ in the equilateral limit and squeezed limit numerically, and confirm that the consistency relation holds in these models. Even though $f_{\mathrm{NL}}$ becomes large at the scales before the power spectrum reaches the peak and the scales where there are wiggles in the power spectrum, it remains to be small at the peak scales. Therefore, the contributions of non-Gaussianity to the scalar induced secondary gravitational waves and primordial black hole abundance are expected to be negligible.
