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arXiv 2102.04676astro-ph.COgr-qc
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Ricci-逆引力理论中的宇宙结构

Cosmic structures in Ricci-inverse theories of gravity

Mattia Scomparin

AI总结:

本研究针对Ricci-逆修正引力理论提出不可能性定理,证明现有模型无法实现稳定的亚视界弱场极限,并提出新方法构建稳定模型,使其在小尺度上与广义相对论一致。

摘要:

我们讨论了一种新型修正引力理论——Ricci-逆理论的一个不可能性定理。通过考虑嵌入在德西特宇宙学中的静态球对称物质分布,我们证明了在先前提出的用于缓解某些宇宙学和暴胀不稳定性的任何模型中,都无法实现稳定的亚视界非相对论弱场极限。我们探索了应对这一挑战的潜在策略,提出了一种构建符合亚视界非相对论弱场极限的稳定模型的新方法。这些模型被证明在小尺度上与广义相对论的预测保持完全一致。

英文摘要:

We discuss a no-go theorem for the novel Ricci-inverse theory of modified gravity. By considering a static spherically symmetric matter distribution embedded within a de Sitter cosmology, we demonstrate that achieving a stable Sub-Horizon non-relativistic Weak-Field limit is unattainable in any of the models previously proposed to mitigate certain cosmological and inflationary instabilities. We explore potential strategies to address this challenge, suggesting a novel methodology for constructing stable models that adhere to the Sub-Horizon non-relativistic Weak-Field limit. These models are shown to maintain full consistency with the predictions of General Relativity at small scales.

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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