arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1709.09192gr-qcastro-ph.COhep-phhep-th
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模拟Born-Infeld引力中的原初宇宙学

Primordial Cosmology in Mimetic Born-Infeld Gravity

Mariam Bouhmadi-López, Che-Yu Chen, Pisin Chen

摘要:

Eddington启发的Born-Infeld(EiBI)模型在模仿方法中重新表述。在存在模拟场的情况下,该模型包含非平凡的真空解,由于理论的玻恩-因费尔德性质,这些解可能没有时空奇异性。我们研究了一个现实的太初真空宇宙,证明了正则解的存在性,如de Sitter型的太初暴胀解或弹跳解。此外,EiBI模型中存在的线性不稳定性被发现是可以避免的一些有趣的弹跳解决方案,其中的物理度量以及辅助度量是定期在背景水平。

英文摘要:

The Eddington-inspired-Born-Infeld (EiBI) model is reformulated within the mimetic approach. In the presence of a mimetic field, the model contains non-trivial vacuum solutions which could be free of spacetime singularity because of the Born-Infeld nature of the theory. We study a realistic primordial vacuum universe and prove the existence of regular solutions, such as primordial inflationary solutions of de Sitter type or bouncing solutions. Besides, the linear instabilities present in the EiBI model are found to be avoidable for some interesting bouncing solutions in which the physical metric as well as the auxiliary metric are regular at the background level.

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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