منابع مشابه
Perturbation spectra from intermediate inflation.
We investigate models of ‘intermediate’ inflation, where the scale factor a(t) grows as a(t) = exp(Atf ), 0 < f < 1, A constant. These solutions arise as exact analytic solutions for a given class of potentials for the inflaton φ. For a simpler class of potentials falling off as a power of φ they arise as slow-roll solutions, and in particular they include, for f = 2/3, the class of potentials ...
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It is shown that spatially homogeneous solutions of the Einstein equations coupled to a nonlinear scalar field and other matter exhibit accelerated expansion at late times for a wide variety of potentials V . These potentials are strictly positive but tend to zero at infinity. They satisfy restrictions on V ′/V and V ′′/V ′ related to the slow-roll approximation. These results generalize Wald’s...
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We consider supersymmetric inflation models in which inflation occurs at an intermediate scale and which provide a solution to the µ problem and the strong CP problem. Such models are particularly attractive since inflation, baryogenesis and the relic abundance of cold dark matter are all related by a set of parameters which also affect particle physics collider phenomena, neutrino masses and t...
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Over the last decade, many central banks have adopted polices known as inflation targeting. To prepare intermediate level macroeconomics students to think about current policy issues, it is important to provide them with an introduction to the macroeconomic implications of inflation targeting. Unfortunately, the standard aggregate demandaggregate supply frameworks commonly used to teach interme...
متن کاملIntermediate inflation in light of the three-year WMAP observations
The three-year observations from the Wilkinson Microwave Anisotropy Probe have been hailed as giving the first clear indication of a spectral index ns < 1. We point out that the data are equally well explained by retaining the assumption ns = 1 and allowing the tensor-to-scalar ratio r to be non-zero. The combination ns = 1 and r > 0 is given (within the slow-roll approximation) by a version of...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2018
ISSN: 1538-4357
DOI: 10.3847/1538-4357/aad3b3