Coupling the inflaton to an expanding aether

被引：53

作者：

Donnelly, William ^{[1
]}

Jacobson, Ted ^{[1
]}

机构：

[1] Univ Maryland, Dept Phys, Ctr Fundamental Phys, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW D | 2010年 / 82卷 / 06期

基金：

美国国家科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1103/PhysRevD.82.064032

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We consider a Lorentz-violating theory of inflation consisting of Einstein-aether theory with a scalar inflaton coupled bilinearly to the expansion of the aether. We determine the conditions for linearized stability, positive energy, and vanishing of preferred-frame post-Newtonian parameters, and find that all these conditions can be met. In homogeneous and isotropic cosmology, the inflaton-aether expansion coupling leads to a driving force on the inflaton that is proportional to the Hubble parameter. This force affects the slow-roll dynamics, but still allows for a natural end to inflation.

引用

页数：12

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