标题： 来自高阶导数量子引力的宇宙膨胀 显示英文标题

标题： Inflationary universe from higher-derivative quantum gravity

摘要： 我们考虑高阶导数量子引力，其中推导出超越一环近似的重整化群改进的有效作用量。 使用此有效作用量，分析了量子修正的弗里德曼-勒梅特-罗伯逊-沃尔克（FRW）方程。 找到了德西特宇宙解。 证明了这种德西特暴胀宇宙是不稳定的。 计算了慢滚暴胀参数。 估计了重整化群改进的高斯-博内特项对量子修正的FRW方程以及德西特宇宙不稳定性的影响。 证明在这种情况下，光谱指数和张量-标量比与普朗克数据一致。 显示英文摘要

摘要： We consider higher-derivative quantum gravity where renormalization group improved effective action beyond one-loop approximation is derived. Using this effective action, the quantum-corrected FRW equations are analyzed. De Sitter universe solution is found. It is demonstrated that such de Sitter inflationary universe is instable. The slow-roll inflationary parameters are calculated. The contribution of renormalization group improved Gauss-Bonnet term to quantum-corrected FRW equations as well as to instability of de Sitter universe is estimated. It is demonstrated that in this case the spectral index and tensor-to-scalar ratio are consistent with Planck data.