We study the cosmological evolution of two coupled scalar fields with an arbitrary interaction term V_T(\phi,\vp) in the presence of a barotropic fluid, which can be matter or radiation. The force between the barotropic fluid and the scalar fields is only gravitational. We show that the dynamics is completely determine by only three parameters L_i i=1,2,3. We determine all critical points and study their stability. We find six different attractor solutions depending on the values of L_i and we calculate the relevant cosmological parameters. We discuss the possibility of having one of the scalar fields as of dark energy while the other could be a scalar field redshifting as matter.
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机译：我们在存在正压流体（可能是物质或辐射）的情况下，以任意相互作用项V_T（\ phi，\ vp）研究两个耦合标量场的宇宙学演化。正压流体和标量场之间的力仅是重力。我们表明动力学完全由三个参数L_i i = 1,2,3完全确定。我们确定所有关键点并研究其稳定性。我们根据L_i的值找到六种不同的吸引子解，并计算相关的宇宙学参数。我们讨论了使标量场之一成为暗能量而另一个可能成为标量场发生红移的可能性。
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