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Cosmological Dynamics of Fourth-Order Gravity with a Gauss-Bonnet Term

机译:具有高斯-邦尼特项的四阶引力的宇宙动力学

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摘要

We consider the cosmological dynamics of fourth-order gravity with both f(R) and Φ(G) corrections to the Einstein gravity (G is the Gauss-Bonnet invariant). The particular case for which both terms are equally important on power-law solutions is described. These solutions and their stability are studied using the dynamic system approach. We also discuss the condition of existence and stability of a de Sitter solution in a more general situation of power-law f and Φ.
机译:我们考虑了对爱因斯坦引力进行f(R)和Φ(G)校正的四阶引力的宇宙动力学(G是高斯-邦尼特不变性)。描述了两个术语在幂律解决方案上同等重要的特定情况。使用动态系统方法研究了这些解决方案及其稳定性。我们还将讨论在幂律f和Φ的更一般情况下de Sitter解的存在性和稳定性的条件。

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