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arXiv 1812.04447astro-ph.COhep-th
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快声宇宙学与de Sitter Swampland猜想的一致性

Consistency of Tachyacoustic Cosmology with de Sitter Swampland Conjectures

Wei-Chen Lin, William H. Kinney

摘要:

最近的研究表明,奥贝德等人提出的德西特沼泽地理论与暴胀宇宙学之间存在着紧张关系。在本文中,我们考虑一种替代通货膨胀,'tachyacoustic'宇宙学,在光的沼泽地acquitures。在速声模型中,原始扰动是由超光速的一段时间而不是加速膨胀产生的。我们表明,速声拉格朗日函数的实现可以与德西特沼泽地猜想一致,因此原则上可以与紫外完全理论一致。我们得到了一个一般的条件,模型与$c_S > 1$是一致的沼泽地地形。

英文摘要:

Recent studies show that there is tension between the de Sitter swampland conjectures proposed by Obeid, et al. and inflationary cosmology. In this paper, we consider an alternative to inflation, `tachyacoustic' cosmology, in light of swampland conjectures. In tachyacoustic models, primordial perturbations are generated by a period of superluminal sound speed instead of accelerating expansion. We show that realizations of tachyacoustic Lagrangians can be consistent with the de Sitter swampland conjectures, and therefore can in principle be consistent with a UV-complete theory. We derive a general condition for models with $c_S > 1$ to be consistent with swampland conjectures.

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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