Single-field inflation à la generalized Chaplygin gas

2013/10/18 by Sergio del Campo
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #CMB cold spot #Chaplygin gas #Cosmology and Gravitation Theories #Inflation (cosmology) #Inflaton #Mathematical and Theoretical Analysis #Planck #Scalar (mathematics) #Scalar field #Spectral index #astro-ph.CO #gr-qc #hep-ph #hep-th

paper · pdf · doi:10.1088/1475-7516/2013/11/004

18 pages, 3 figures, accepted for the publication in JCAP. arXiv admin note: text overlap with arXiv:1212.1315

arxiv created 2013/10/18 · openalex publication_date 2013/11/05 · arxiv updated 2015/06/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

In the simplest scenario for inflation, i.e. in the single-field inflation, it is presented an inflaton field with properties equivalent to a generalized Chaplygin gas. Their study is performed using the Hamilton-Jacobi approach to cosmology. The main results are contrasted with the measurements recently released by the Planck data, combined with the WMAP large-angle polarization. If the measurements released by Planck for the scalar spectral index together with its running are taken into account it is found a value for the α-parameter associated to the generalized Chaplygin gas given by α = 0.2578±0.0009.

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