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arXiv 0802.0398hep-thastro-phgr-qc
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多膜暴胀的引力波约束

Gravitational Wave Constraints on Multi-Brane Inflation

Ian Huston, James E. Lidsey, Steven Thomas, John Ward

摘要:

确定了一类非正则暴胀模型,其中曲率扰动对非高斯性的首阶贡献由暴胀子场中涨落的声速决定.包括在这类模型是有效的行动,多个重合膜在有限n极限。这个组态的作用量是根据SU(2)的基本表示,用一种强有力的迭代方法确定的。原则上,在标准的单膜DBI暴胀场景中出现的张量标量比的上限可以在这样的多膜配置中放松,如果产生大的和可检测的非高斯性。此外,具有少量重合膜的模型可以产生引力波背景,这将在未来的实验中被观察到。

英文摘要:

A class of non-canonical inflationary models is identified, where the leading-order contribution to the non-Gaussianity of the curvature perturbation is determined by the sound speed of the fluctuations in the inflaton field. Included in this class of models is the effective action for multiple coincident branes in the finite n limit. The action for this configuration is determined using a powerful iterative technique, based upon the fundamental representation of SU(2). In principle the upper bounds on the tensor-scalar ratio that arise in the standard, single-brane DBI inflationary scenario can be relaxed in such multi-brane configurations if a large and detectable non-Gaussianity is generated. Moreover models with a small number of coincident branes could generate a gravitational wave background that will be observable to future experiments.

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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