ACCELERATING EXPANSION AND CHANGE OF SIGNATURE

被引：0

作者：

Mars, M. ^{[1
]}

Senovilla, J. M. M. ^{[2
]}

Vera, R. ^{[2
]}

机构：

[1] Univ Salamanca, Dept Fis Fundamental, Plaza Merced S-N, E-37008 Salamanca, Spain

[2] Univ Basque Country, Fis Teor, E-48080 Bilbao, Spain

来源：

SPANISH RELATIVITY MEETING, ERE2007: RELATIVISTIC ASTROPHYSICS AND COSMOLOGY | 2008年 / 30卷

关键词：

D O I：

10.1051/eas:0830050

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show that some types of sudden singularities admit a natural explanation in terms of regular changes of signature on braneworlds ill AdS(5). The present accelerated expansion of the Universe and its possible ending at a sudden singularity may therefore simply be all indication that our braneworld is about to change its Lorentzian signature to an Euclidean one, while remaining fully regular. Ail explicit example of this behaviour satisfying the weak and strong energy conditions is presented.

引用

页码：307 / +

页数：2

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