标题： 多场非平坦场空间通胀宇宙观测量 显示英文标题

标题： Cosmological observables in multi-field inflation with a non-flat field space

摘要： 使用$\delta N$形式主义，在多场膨胀的通用背景下，我们重新审视了各种宇宙观测值的解析表达式，如标量/张量功率谱、标量/张量谱倾斜、非高斯性参数、张量与标量比以及这些可观测量的各种跑动。 在我们的逆向形式主义方法中，可观测量的后续表达式自动包含了超出主导阶次慢滚展开的项，修正了许多次主导阶次的表达式。 为了使我们的分析与早期结果良好对接，我们在我们的一般公式限制情况下重新推导了（已知的）单场表达式。 此外，在 PLANCK 结果的背景下，我们检查了在大体积场景中实现的两场轮盘多项瞬时膨胀的慢滚阶段内一致性关系的兼容性。 显示英文摘要

摘要： Using $\delta N$ formalism, in the context of a generic multi-field inflation driven on a non-flat field space background, we revisit the analytic expressions of the various cosmological observables such as scalar/tensor power spectra, scalar/tensor spectral tilts, non-Gaussianity parameters, tensor-to-scalar ratio, and the various runnings of these observables. In our backward formalism approach, the subsequent expressions of observables automatically include terms beyond the leading order slow-roll expansion correcting many of the expression at subleading order. To connect our analysis properly with the earlier results, we rederive the (well) known (single field) expressions in the limiting cases of our generic formulae. Further, in the light of PLANCK results, we examine for the compatibility of the consistency relations within the slow-roll regime of a two-field roulette poly-instanton inflation realized in the context of large volume scenarios.