2006/12/11 by J. S. Alcaniz, F. C. Carvalho · 2 citations
Economics, Econometrics and Finance · Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Stochastic processes and financial applications #astro-ph #gr-qc #hep-th
paper · pdf · doi:10.1209/0295-5075/79/39001
published as Europhys.Lett.79:39001,2007 · 4 pages, 3 figures, LaTeX
arxiv created 2006/12/11 · openalex publication_date 2007/07/12 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
An inflationary scenario driven by a slow rolling homogeneous scalar field whose potential V (Φ) is given by a generalized exponential function is discussed. Within the slow-roll approximation we investigate some of the main predictions of the model and compare them with current data from Cosmic Microwave Background and Large-Scale Structure observations. In particular, we show that this single scalar field model admits a wider range of solutions than do conventional exponential scenarios and predicts acceptable values of the scalar spectral index and of the tensor-to-scalar ratio for the remaining number of e-folds lying in the interval N =54 ± 7 and energy scales of the order of Planck scale. The running of the spectral index is briefly discussed to show that both negative and positive values are predicted by the model here proposed.