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arXiv 1406.5652gr-qcastro-ph.COhep-th
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Gauss-Bonnet宇宙学中的Noether对称性方法

Noether Symmetry Approach in Gauss-Bonnet Cosmology

Salvatore Capozziello, Mariafelicia De Laurentis, Sergei D. Odintsov

摘要:

在Gauss-Bonnet宇宙学的框架下讨论了Noether对称性方法,证明了$F(R, {\cal G})$函数的函数形式,其中$R$是Ricci标量,${\cal G}$是Gauss-Bonnet拓扑不变量,可以通过对称性的存在来确定.此外,由于宇宙动力学系统的约化和守恒量的存在,该方法还可以求出精确解。提出了一些具体的宇宙学模型

英文摘要:

We discuss the Noether Symmetry Approach in the framework of Gauss-Bonnet cosmology showing that the functional form of the $F(R, {\cal G})$ function, where $R$ is the Ricci scalar and ${\cal G}$ is the Gauss-Bonnet topological invariant, can be determined by the presence of symmetries. Besides, the method allows to find out exact solutions due to the reduction of cosmological dynamical system and the presence of conserved quantities. Some specific cosmological models are worked out

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