标量-张量宇宙学中的动力学稳定性
Dynamical stability in scalar-tensor cosmology
摘要:
我们研究了引力双标量-张量理论的FRW宇宙学,其中两个标量场与几何非极小耦合。在相空间中研究模型的稳定性和吸引子解的框架下,我们用观测数据约束模型参数。对于一个加速的宇宙,这个模型的行为就像quintom暗能量模型,并预测了从精粹时代到幻影时代的转变。
英文摘要:
We study FRW cosmology for a double scalar - tensor theory of gravity where two scalar fields are nonminimally coupled to the geometry. In a framework to study stability and attractor solutions of the model in the phase space, we constraint the model parameters with the observational data. For an accelerating universe, the model behaves like quintom dark energy models and predicts a transition from quintessence era to phantom era.
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