Accelerated expansion in the effective field theory of a radiation dominated universe

被引：0
|
作者：
Balthazar, Bruno [1 ]
Ferreira, Pedro G. [1 ]
机构：
[1] Univ Oxford, Astrophys, Oxford OX1 3RH, England
来源：
PHYSICAL REVIEW D | 2015年 / 91卷 / 06期
关键词：
D O I：
10.1103/PhysRevD.91.061502
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We construct the effective field theory of a perfect fluid in the early Universe. Focusing on the case where the fluid has the equation of state of radiation, we show that it may lead to corrections to the background dynamics that can dominate over those of an effective field theory of gravity alone. We describe the periods of accelerated expansion, in the form of inflationary and bounce solutions, that arise in the background dynamics and discuss their regime of validity within effective field theory.
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页数：5
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