论文标题
标量调整宇宙学的从通货膨胀到暗能量
From inflation to dark energy in scalar-tensor cosmology
论文作者
论文摘要
动力学系统的方法在宇宙学中发现了广泛的应用，重点是通货膨胀或进入黑暗能源时代。在本文中，我们努力通过考虑使用辐射和灰尘液在Friedmann-Lemaitre-Robertson-Walker SpaceTime中的辐射和灰尘流体中考虑通用标量张量引力来将整个宇宙的整个历史捕获为动态系统。我们以这样的方式构造动力学变量，即宇宙进化的主要阶段，即。通货膨胀，辐射支配，物质统治和暗能量统治可以由相空间中的各个固定点表示。由于溶液的演变由这些固定点具有适当特性的序列统治，因此我们可以确定标量电势和非微小耦合必须满足模型以通用方式提供可行的宇宙历史的条件。我们说明了具有四分之一势的标量场的结构，没有和没有二次非微耦合与曲率的结构。
The methods of dynamical systems have found wide applications in cosmology, with focus either upon inflation or upon the passage into dark energy era. In this paper, we endeavor to capture the whole history of the universe into a dynamical system by considering generic scalar tensor gravity with radiation and dust matter fluids in flat Friedmann-Lemaitre-Robertson-Walker spacetime. We construct the dynamical variables in such a way that the main stages of the cosmic evolution, viz. inflation, radiation domination, matter domination, and dark energy domination can be represented by the respective fixed points in the phase space. As the evolution of solutions is ruled by the sequence of these fixed points with appropriate properties, we can determine the conditions that the scalar potential and nonminimal coupling must satisfy for the model to deliver viable cosmic history in a generic manner. We illustrate the construction by a scalar field with quartic potential, with and without quadratic nonminimal coupling to curvature.
