揭开宇宙的动力学面纱
Unveiling the dynamics of the universe
摘要:
我们提出了两种方法来描述,从教学的角度来看,爱因斯坦方程的解决方案适用于均匀和各向同性的宇宙。在第一种方法中,我们定义了宇宙的有效引力势,第二种方法利用了我们可以定义动力学方程组的事实。这些方法被应用到不同的宇宙学模型,其性质进行了讨论。最终的目的是提供简单的例子,在第一宇宙学课程的本科生进行修订。
英文摘要:
We present two methods for describing, from a pedagogical point of view, the solutions of Einstein's equations applied to a homogeneous and isotropic universe. In the first method, we define an effective gravitational potential of the universe, and the second method makes use of the fact that we can define a dynamical system of equations. The methods are applied to different cosmological models whose properties are discussed in turn. The ultimate intention is to provide simple examples to be revised in a first Cosmology course for undergraduates.
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