Generalized G-Inflation —Inflation with the Most General Second-Order Field Equations—
Generalized G-Inflation —Inflation with the Most General Second-Order Field Equations—
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DOI：
10.1143/ptp.126.511
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发表时间：
2011-05
影响因子：
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通讯作者：
Tsutomu Kobayashi;Masahide Yamaguchi;J. Yokoyama
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文献类型：
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作者：
Tsutomu Kobayashi;Masahide Yamaguchi;J. Yokoyama
我们研究广义伽利略作为一个框架来开发有史以来最通用的单场暴胀模型，即广义 G-暴胀，其中包含 G-暴胀的进一步泛化，以及之前的例子，例如 k-暴胀、扩展暴胀和作为特殊情况的新希格斯暴胀。我们研究了该模型中的背景和扰动演化，计算张量和标量宇宙学扰动的最一般的二次作用，以给出稳定性标准和原初涨落的功率谱。附录中指出Horndeski理论与广义伽利略理论是等价的。特别是，即使是与 Gauss-Bonnet 项的非最小耦合也以非平凡的方式包含在广义伽利略中。主题索引：440、442、453
We study generalized Galileons as a framework to develop the most general single-field inflation models ever, Generalized G-inflation, containing yet further generalization of Ginf lation, as well as previous examples such as k-inflation, extended inflation, and new Higgs inflation as special cases. We investigate the background and perturbation evolution in this model, calculating the most general quadratic actions for tensor and scalar cosmological perturbations to give the stability criteria and the power spectra of primordial fluctuations. It is pointed out in the Appendix that the Horndeski theory and the generalized Galileons are equivalent. In particular, even the non-minimal coupling to the Gauss-Bonnet term is included in the generalized Galileons in a non-trivial manner. Subject Index: 440, 442, 453