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arXiv 0905.0543gr-qchep-th
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de Sitter空间中非局部修正Gauss-Bonnet引力的单圈有效action

One-loop effective action for non-local modified Gauss-Bonnet gravity in de Sitter space

Guido Cognola, Emilio Elizalde, Shin'ichi Nojiri, Sergei D. Odintsov, Sergio Zerbini

摘要:

我们讨论了de Sitter空间中非定域修正Gauss-Bonnet引力的经典和量子性质,利用它的等价表示,即带标量势的弦激发的定域标量Gauss-Bonnet引力.一个经典的,乘德西特宇宙的解决方案被发现,其中一个德西特阶段对应于原始的通货膨胀时代,而其他德西特空间解决方案-一个最小的哈勃速率-描述了我们的宇宙的后期加速。一个变色龙的情况下,正在调查的理论开发,它是成功地用来表明,该理论符合引力测试。在de Sitter空间中得到了这种非定域修正的Gauss-Bonnet引力的单圈有效作用量的显式表达式。有人认为,这种有效的行动可能是一个重要的一步,解决宇宙学常数的问题。

英文摘要:

We discuss the classical and quantum properties of non-local modified Gauss-Bonnet gravity in de Sitter space, using its equivalent representation via string-inspired local scalar-Gauss-Bonnet gravity with a scalar potential. A classical, multiply de Sitter universe solution is found where one of the de Sitter phases corresponds to the primordial inflationary epoch, while the other de Sitter space solution--the one with the smallest Hubble rate--describes the late-time acceleration of our universe. A Chameleon scenario for the theory under investigation is developed, and it is successfully used to show that the theory complies with gravitational tests. An explicit expression for the one-loop effective action for this non-local modified Gauss-Bonnet gravity in the de Sitter space is obtained. It is argued that this effective action might be an important step towards the solution of the cosmological constant problem.

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。

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