论文标题
宇宙学爱因斯坦立方重力的全球渐近动力学
Global asymptotic dynamics of Cosmological Einsteinian Cubic Gravity
论文作者
论文摘要
在本文中，我们研究了被称为宇宙学爱因斯坦立方重力（CECG）的总体相对性（GR）的宇宙曲率校正（GR）的宇宙学动力学，其真空光谱由Graviton独家组成，其宇宙学被很好地作为初始值问题。我们能够发现该理论相位空间的全球渐近结构。据透露，以通货膨胀为主的Bigbang是全球的吸引子，这意味着通货膨胀是任何物理上有意义的宇宙历史的起点。假设对GR的高阶曲率校正被认为会在早期影响宇宙学动力学（高能量/较大的曲率极限），那么晚期通胀不可能是直至立方顺序曲率修饰的结果。我们通过证明CECG模型中的延迟加速度仅在添加宇宙恒定项时才有可能确认这一假设。
In this paper we investigate the cosmological dynamics of an up to cubic curvature correction to General Relativity (GR) known as Cosmological Einsteinian Cubic Gravity (CECG), whose vacuum spectrum consists of the graviton exclusively and its cosmology is well-posed as an initial value problem. We are able to uncover the global asymptotic structure of the phase space of this theory. It is revealed that an inflationary matter-dominated bigbang is the global past attractor which means that inflation is the starting point of any physically meaningful cosmic history. Given that higher order curvature corrections to GR are assumed to influence the cosmological dynamics at early times -- high energies/large curvature limit -- the late-time inflation can not be a consequence of the up to cubic order curvature modifications. We confirm this assumption by showing that late-time acceleration of the expansion in the CECG model is possible only if add a cosmological constant term.
