منابع مشابه
Vector Field Models of Inflation and Dark Energy
Vector field models of inflation and dark energy are investigated. We consider nonminimal couplings of the vectors both in the matter and in the gravity sector. The cosmological equations, allowing anisotropic background expansion, are then studied as a dynamical system. We show the general conditions for the existence of scaling solutions for spatial fields. A vector with an inverse power-law ...
متن کاملInitial Conditions for Vector Inflation
Recently, a model of inflation using non-minimally coupled massive vector fields has been proposed. For a particular choice of non-minimal coupling parameter and for a flat FRW model, the model is reduced to the model of chaotic inflation with massive scalar field. We study the effect of non-zero curvature of the universe on the onset of vector inflation. We find that in a curved universe the d...
متن کاملTesting two-field inflation
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. We derive accurate semianalytic formulas for the power spectra from two-field inflation assuming an arbitrary poten...
متن کاملDouble-field inflation.
We present an inflationary universe model which utilizes two coupled real scalar fields. The inflation field φ experiences a first order phase transition and its potential dominates the energy density of the Universe during the inflationary epoch. This field φ is initially trapped in its metastable minimum and must tunnel through a potential barrier to reach the true vacuum. The second auxiliar...
متن کاملTesting and comparing tachyon inflation to single standard field inflation
We study the evolution of perturbations during the domination and decay of a massive particle species whose mass and decay rate are allowed to depend on the expectation value of a light scalar field. We specialize to the case where the light field is slow-rolling, showing that during a phase of inhomogeneous mass-domination and decay the isocurvature perturbation of the light field is converted...
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ژورنال
عنوان ژورنال: International Journal of Modern Physics: Conference Series
سال: 2011
ISSN: 2010-1945,2010-1945
DOI: 10.1142/s201019451100016x