Indications of de Sitter spacetime from classical sequential growth dynamics of causal sets

被引:18
作者
Ahmed, Maqbool [1 ]
Rideout, David [2 ]
机构
[1] Natl Univ Sci & Technol, Ctr Adv Math & Phys, Rawalpindi 46000, Pakistan
[2] Perimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5, Canada
来源
PHYSICAL REVIEW D | 2010年 / 81卷 / 08期
关键词
D O I
10.1103/PhysRevD.81.083528
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
A large class of the dynamical laws for causal sets described by a classical process of sequential growth yields a cyclic universe, whose cycles of expansion and contraction are punctuated by single "origin elements'' of the causal set. We present evidence that the effective dynamics of the immediate future of one of these origin elements, within the context of the sequential growth dynamics, yields an initial period of de Sitter-like exponential expansion, and argue that the resulting picture has many attractive features as a model of the early universe, with the potential to solve some of the standard model puzzles without any fine-tuning.
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页数:11
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