标题： 标量场相位动力学在再加热过程中 显示英文标题

标题： Scalar field phase dynamics in preheating

摘要： 我们研究了一个大质量的暴胀场$\phi$与另一个标量场$\chi$相互作用的模型，相互作用项为$g^2\phi^2\chi^2$，这是再加热的第一阶段。 我们得到了相位行为的特征，该特征是简单圆映射族迭代的结果。 当考虑到宇宙的膨胀时，相位的定性行为和增长数的演化类似于没有膨胀情况下的行为。 显示英文摘要

摘要： We study the model of a massive inflaton field $\phi$ coupled to another scalar filed $\chi$ with interaction term $g^2\phi^2\chi^2$ for the first stage of preheating. We obtain the the behavior of the phase in terms of the iteration of a simple family of circle maps. When expansion of the universe is taken into account the qualitative behavior of the phase and growth number evolution is reminiscent of the behavior found in the case without expansion.