期刊
PHYSICAL REVIEW D
卷 81, 期 10, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.81.103509
关键词
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资金
- European Union [FP-7-REGPOT-2008-1-CreteHEPCosmo-228644]
- NSF [PHY-0653085, PHY-0855021]
- Institute for Fundamental Theory at the University of Florida
We study a class of nonlocal, purely gravitational models, which have the correct structure to reproduce the leading infrared logarithms of quantum gravitational backreaction during the inflationary regime. These models end inflation in a distinctive phase of oscillations with slight and short violations of the weak energy condition and should, when coupled to matter, lead to rapid reheating. By elaborating this class of models we exhibit one that has the same behavior during inflation, goes quiescent until the onset of matter domination, and induces a small, positive cosmological constant of about the right size thereafter.
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