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首页> 外文期刊>International journal of modern physics, D. Gravitation, astrophysics, cosmology >A smooth constant-roll to a slow-roll modular inflation transition
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A smooth constant-roll to a slow-roll modular inflation transition

机译：慢辊模块化通胀过渡的平滑恒定滚动

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摘要

In this work, we investigate how a smooth transition from a constant-roll to a slowroll inflationary era may be realized in the context of a canonical scalar field theory. We study in some detail the dynamical evolution of the cosmological system, and we investigate whether a stable attractor exists, both numerically and analytically. We also investigate the slow-roll era and as we demonstrate, the partially compatibility of the resulting scalar theory may be achieved with the potential of the latter belonging to a class of modular inflationary potentials. The novel features of the constant-roll to slowroll transition which we achieved are firstly that it is not compelling for the slow-roll era to last for N similar to 50-60 e-foldings, but it may last for a smaller number of e-foldings, since some e-foldings may occur during the constant-roll era. Secondly, when the slow-roll era occurs after the constant-roll era, the graceful exit from inflation may occur, a feature absent in the constant-roll scenario, due to the stability properties of the final attractor in the constant-roll case.
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