Dynamical fine-tuning of initial conditions for small field inflation
نویسندگان
چکیده
منابع مشابه
Fine-tuning of the initial conditions for hybrid inflation
One of the most attractive features of hybrid inflation @1# is that it can take place for values of the inflation field below the Planck scale @2#. This permits the construction of realistic field theoretical models without the need of a description of quantum gravity. Several such models have been proposed within the context of supersymmetry @2–9#. Inflation requires the presence of an almost ...
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Free scalar fields in de Sitter space have a one-parameter family of states invariant under the de Sitter group, including the standard thermal vacuum. We show that, except for the thermal vacuum, these states are unphysical when gravitational interactions are included. We apply these observations to the quantum state of the inflaton, and find that at best, dramatic fine tuning is required for ...
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We argue about the importance of embedding the successful mechanism of Inflation in the context of a fundamental theory. We review some of the attempts in this direction made in the framework of String Theory. In particular we report on recent developments in Brane Inflation with emphasis on the fine tuning issue.
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 کاملInitial Conditions for Supersymmetric Inflation
We perform a numerical investigation of the fields evolution in the supersymmetric inflationary model based on radiative corrections. Supergravity corrections are also included. We find that, out of all the examined initial data, only about 10% give an adequate amount of inflation and can be considered as ”natural”. Moreover, these successful initial conditions appear scattered and more or less...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2016
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.93.084009