منابع مشابه
Field Evolution Leading to Hybrid Inflation
In general the onset of hybrid inflation requires an extremely homogeneous field configuration at the end of the Planck era. The field φ orthogonal to the inflaton σ must be zero with high accuracy over a range exceeding the initial horizon size ∼ m Pl by about two orders of magnitude. We consider a supersymmetric model that permits the decay of the oscillating field φ into light particles. We ...
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Obtaining a potential flat enough to provide slow roll inflation is often difficult when gravitational effects are included. Nonabelian discrete gauge symmetries can guarantee the flatness of the inflaton potential in this case, and also provide special field values where inflation can end. [email protected] Address from August 1999. [email protected] Address from August 1999.
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The goal of this project is to construct leading indicators that anticipate inflation cycle turning points on a real time monitoring basis. As a first step, turning points of the IPCA inflation are determined using a periodic stochastic Markov switching model. These turning points are the event timing that the leading indicators should anticipate. A dynamic factor model is then used to extract ...
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Many economists expect inflation to rise in 1995. These expectations are based on various approaches to forecasting inflation. One approach is based on the standard economic theory that inflation rises when slack is eliminated from the economy and production exceeds capacity constraints. According to this view, measures of economic slack such as unemployment and capacity utilization provide use...
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We present here the general transformation that leaves unchanged the form of the field equations for perfect fluid cosmologies in the DGP braneworld model. Specifically, a prescription for relating exact solutions with different equations of state is provided, and the symmetries found can be used as algorithms for generating new cosmological models from previously known ones. We also present, i...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2003
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.67.083518