论文标题
约旦框架中两刻度田地宇宙学的宇宙学演变
Cosmological Evolution of Two-Scalar fields Cosmology in the Jordan frame
论文作者
论文摘要
在本文中，我们研究了约旦框架中定义的两尺度场引力理论的宇宙学演化。具体而言，我们假设一个标量场之一被最小化与重力耦合，而第二个字段是Brans-dicke标量场，则非最小程度地耦合到重力，并且还与另一个标量场耦合。在爱因斯坦框架中，该理论还原为两个尺度场理论，其中两个字段只能在潜在项中相互作用，这意味着恢复了五重奏理论。通过分析约旦框架中场方程的平衡点来研究宇宙学的演化。我们发现，该理论可以在大规模中描述宇宙学的演变，同时还提供了通货膨胀解决方案。
In the present article we study the cosmological evolution of a two-scalar field gravitational theory defined in the Jordan frame. Specifically, we assume one of the scalar fields to be minimally coupled to gravity, while the second field which is the Brans-Dicke scalar field is nonminimally coupled to gravity and also coupled to the other scalar field. In the Einstein frame this theory reduces to a two-scalar field theory where the two fields can interact only in the potential term, which means that the quintom theory is recovered. The cosmological evolution is studied by analyzing the equilibrium points of the field equations in the Jordan frame. We find that the theory can describe the cosmological evolution in large scales, while inflationary solutions are also provided.
