论文标题

较高的曲率重力中的小自由场通货膨胀

Small free field inflation in higher curvature gravity

论文作者

Edelstein, Jose D., Mann, Robert B., Rodríguez, David Vázquez, López, Alejandro Vilar

论文摘要

在一般相对论中,只要其价值和旅行大于普朗克量表,但受二次潜能控制的最小耦合标量场就能够产生加速的宇宙扩张。这是所谓的大型现场通货膨胀模型的原型示例。我们表明,通过以几何通货膨胀模型的形式将更高的曲率校正在重力作用中包括在重力作用中,可以通过自由标量场获取加速膨胀,其值远低于Planck量表,从而将传统的大型田地模型变成一个小场。我们提供了理论必须满足的条件,以使该机制运行,并提出了两个说明它的明确模型。最后,我们提出了这种情况所提出的一些公开问题,在这种情况下,通货膨胀完全在较高的曲率统治状态下发生,例如有关扰动研究的政权。

Within General Relativity, a minimally coupled scalar field governed by a quadratic potential is able to produce an accelerated expansion of the universe provided its value and excursion are larger than the Planck scale. This is an archetypical example of the so called large field inflation models. We show that by including higher curvature corrections to the gravitational action in the form of the Geometric Inflation models, it is possible to obtain accelerated expansion with a free scalar field whose values are well below the Planck scale, thereby turning a traditional large field model into a small field one. We provide the conditions the theory has to satisfy in order for this mechanism to operate, and we present two explicit models illustrating it. Finally, we present some open questions raised by this scenario in which inflation takes place completely in a higher curvature dominated regime, such as those concerning the study of perturbations.

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