arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1302.5013gr-qc
收藏

Eddington-Born-Infeld理论真的没有宇宙学奇点吗?

Is Eddington-Born-Infeld theory really free of cosmological singularities?

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

摘要:

Eddington启发的Born-Infeld(EiBI)理论最近复活了。这种理论的特点是在真空中与爱因斯坦理论等价,但在有物质存在时与之不同。该理论的优点之一是避免了充满辐射的宇宙的大爆炸奇点。本文分析了这类模型的奇异性避免问题。更准确地说,我们分析了一个均匀和各向同性的宇宙充满了幻影能量,除了黑暗和重子物质的行为。与在这种模型中可以通过对物理度规的反弹或游荡效应来避免大爆炸奇点不同,我们发现在EiBI幻影模型中大撕裂奇点是不可避免的,即使与基于标准广义相对论的其他模型中的相同奇点相比,它可以被推迟到稍微更远的未来宇宙时间,并且具有相同的物质含量。

英文摘要:

The Eddington-inspired-Born-Infeld (EiBI) theory has been recently resurrected. Such a theory is characterized by being equivalent to Einstein theory in vacuum but differing from it in the presence of matter. One of the virtues of the theory is to avoid the Big Bang singularity for a radiation filled universe. In this paper, we analyze singularity avoidance in this kind of model. More precisely, we analyze the behavior of a homogeneous and isotropic universe filled with phantom energy in addition to the dark and baryonic matter. Unlike the Big Bang singularity that can be avoided in this kind of model through a bounce or a loitering effect on the physical metric, we find that the Big Rip singularity is unavoidable in the EiBI phantom model even though it can be postponed towards a slightly further future cosmic time as compared with the same singularity in other models based on the standard general relativity and with the same matter content described above.

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。

↑