一般纯非形式引力理论中的范施泰因机制
Vainshtein mechanism in general purely disformal gravity theory
摘要:
我们研究的引力理论中的行动是一个结果,从一般纯粹的非形式变换的爱因斯坦-希尔伯特行动。该理论是GLPV理论的一个子类,GLPV理论是协变Galileon的推广。然而,我们发现背景宇宙的自加速解在这个理论中消失了。我们还发现,对于这个理论,Vainshtein机制是不存在的。然而,Vainshtein机制对这个理论来说不是必需的,因为这个理论几乎可以在没有这个机制的情况下在哈勃半径内的所有尺度上模仿爱因斯坦的引力理论。
英文摘要:
We study a theory of gravity in which the action is a result from the general purely disformal transformation on the Einstein-Hilbert action. This theory is a sub-class of GLPV theory which is the the generalization of covariant Galileon. Nevertheless, we find that the self accelerating solution for the background universe disappears in this theory. We also find that, for this theory, the Vainshtein mechanism is absent. However, the Vainshtein mechanism is not necessary for this theory, because this theory can nearly mimic the Einstein theory of gravity at all scales inside the Huble radius without this mechanism.
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