论文标题
具有幻影术语的两个标量场宇宙学模型的动力学
Dynamics of a two scalar field cosmological model with phantom terms
论文作者
论文摘要
我们对类似手性宇宙学模型的动力学进行了详细的分析，其中标量场可能具有负动力学术语。特别是，我们研究了在空间平坦的Friedmann-lema \^ıtre-Robertson-walker背景空间中的四个不同模型的引力场方程的渐近动力学。当标量字段之一是幻影时，我们计算出宇宙流体可以演变，以使状态方程的参数交叉两倍，而没有幽灵出现。此外，讨论了这四个模型的宇宙生存能力。
We perform a detailed analysis on the dynamics of a Chiral-like cosmological model where the scalar fields can have negative kinetic terms. In particular, we study the asymptotic dynamics for the gravitational field equations for four different models in a spatially flat Friedmann--Lema\^ıtre--Robertson--Walker background space. When one of the scalar fields is phantom, we calculated that the cosmological fluid can evolves such that the parameter for the equation of state crosses twice the phantom divide line without the appearance of ghosts. Moreover, the cosmological viability of these four models is discussed.
