标题： 具有物质的两个标量模型中的稳定幻影分裂交叉 显示英文标题

标题： Stable phantom-divide crossing in two scalar models with matter

摘要： 我们构建了具有两个标量场的宇宙学模型，其结构类似于幽灵凝聚模型或k-essence模型。 这些模型可以描述稳定的幻影穿越，这与单标量张量模型形成对比，在单标量张量模型中，当跨越幻影划分时会出现无限不稳定性。 尽管在之前基于标量张量模型扩展的双标量模型中，很难在包含物质的情况下给出重建的表述，我们通过包含物质给出了以e-foldings N表示的重建的一般表述。 在重建的表述中，我们从一个带有任意函数的模型开始，找到生成宇宙膨胀历史的函数。 我们还对模型和重建解的稳定性进行了通用讨论。 通过比较观测数据也可以研究一个模型的可行性。 显示英文摘要

摘要： We construct cosmological models with two scalar fields, which has the structure as in the ghost condensation model or k-essence model. The models can describe the stable phantom crossing, which should be contrasted with one scalar tensor models, where the infinite instability occurs at the crossing the phantom divide. We give a general formulation of the reconstruction in terms of the e-foldings N by including the matter although in the previous two scalar models, which are extensions of the scalar tensor model, it was difficult to give a formulation of the reconstruction when we include matters. In the formulation of the reconstruction, we start with a model with some arbitrary functions, and find the functions which generates the history in the expansion of the universe. We also give general arguments for the stabilities of the models and the reconstructed solution. The viability of a model is also investigated by comparing the observational data.