期刊
PHYSICAL REVIEW D
卷 82, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.82.064032
关键词
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资金
- Foundational Questions Institute (FQXi) [RFP20816]
- NSF [0601800, 0903572]
- NSERC
- Direct For Mathematical & Physical Scien
- Division Of Physics [0903572, 0601800] Funding Source: National Science Foundation
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.
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