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arXiv 1306.4392gr-qchep-th
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Born-Infeld引力的非奇异Promises

Nonsingular Promises from Born-Infeld Gravity

Franco Fiorini

摘要:

在Friedmann-Robertson-Walker(FRW)宇宙学的背景下讨论了在Weitzenbock时空中表述的Born-Infeld行列式引力。它显示了标准模型大爆炸奇异性是如何在某些空间平坦的FRW时空中不存在的,其中高能区的特征是几何特征的de Sitter暴胀阶段,即,而不存在暴胀子场。这种驯服的初始奇异性也实现了一些空间弯曲的FRW流形的奇异性被取代的de Sitter阶段或大反弹的比例因子取决于某些组合的自由参数出现在行动。与其他流行的Born-Infeld理论不同,这里提出的理论也能够使真空广义相对论解变形。

英文摘要:

Born-Infeld determinantal gravity formulated in Weitzenbock spacetime is discussed in the context of Friedmann-Robertson-Walker (FRW) cosmologies. It is shown how the standard model big bang singularity is absent in certain spatially flat FRW spacetimes, where the high energy regime is characterized by a de Sitter inflationary stage of geometrical character, i.e., without the presence of the inflaton field. This taming of the initial singularity is also achieved for some spatially curved FRW manifolds where the singularity is replaced by a de Sitter stage or a big bounce of the scale factor depending on certain combinations of free parameters appearing in the action. Unlike other Born-Infeld-like theories in vogue, the one here presented is also capable of deforming vacuum general relativistic solutions.

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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