将现有文献中存在的暗能量模型(严格的说是指解释现在宇宙的加速膨胀模型)分为三类.第一类是将宇宙加速归因为在宇宙尺度上广义相对论的修改;第二类是由于宇宙微扰的反作用或宇宙非均匀性的作用;第三类为宇宙中存在的一类奇异能量成分,它出现在爱因斯坦方程的右边.对每一类模型,举了几个例子,并给以一些评述.
In this talk I divide dark energy models (precisely speaking, models to explain origin of current cosmic acceleration) existing in literatures in to three classes. The first one is to ascribe the cosmic acceleration to modifications of general relativity at cosmological scales. The second one is due to the backreaction of perturbations, or say, the effect of inhomogeneity of the universe. The third one is some exotic component in the universe, which appears in the right hand side of Einstein's equations. For each class I demonstrate some examples.