arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1503.01579hep-thastro-ph.COgr-qchep-ph
收藏

Gauss-Bonnet暴胀

Gauss-Bonnet Inflation

Panagiota Kanti, Radouane Gannouji, Naresh Dadhich

摘要:

我们考虑一个爱因斯坦标量高斯邦纳引力理论,并认为在早期的里奇标量可以安全地忽略。然后,我们证明了纯标量高斯-邦纳理论,与二次耦合函数,自然支持通货膨胀-德西特-解决方案。在暴胀过程中,标量场指数衰减,其有效势始终保持有界。该理论还包含解决方案,这些德西特阶段具有自然的退出机制,并取代线性膨胀-米尔恩-阶段。

英文摘要:

We consider an Einstein-Scalar-Gauss-Bonnet gravitational theory, and argue that at early times the Ricci scalar can be safely ignored. We then demonstrate that the pure scalar-Gauss-Bonnet theory, with a quadratic coupling function, naturally supports inflationary -- de Sitter -- solutions. During inflation, the scalar field decays exponentially and its effective potential remains always bounded. The theory contains also solutions where these de Sitter phases possess a natural exit mechanism and are replaced by linearly expanding -- Milne -- phases.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑