论文标题
k史模型中的严重崩溃
Critical collapse in K-essence models
论文作者
论文摘要
我们研究具有移位对称性的K效率模型中的重力崩溃。对于这些模型，我们形成了两种类型的视野，即事件和声音。对于特定情况，$ k（x）= x+βx^2 $，我们找到了三个不同的制度。在弱场状态下，标量场分散到无穷大，在非常强的状态下，两种范围同时形成，最后对于中间状态，声音地平线可以同时首先形成或两个地平线形成。黑洞形成的阈值在首先形成声音地平线的制度中发现。我们观察到一种普遍的行为，具有缩放参数$γ\ simeq 0.51 $。有趣的是，这种普遍行为已经在黑洞形成之前已经在声音地平线上编码，因此已经在事件视野的出现之前编码。
We study gravitational collapse in K-essence model with shift symmetry. For these models, we have the formation of two types of horizons, event and sonic. For the particular case $K(X)=X+βX^2$ we found three different regimes. In the weak field regime the scalar field disperses to infinity, in the very strong regime both horizons form at the same time and finally for the intermediate regime, the sonic horizon could form first or both horizons form at the same time. The threshold of formation of black hole is found in the regime where the sonic horizon forms first. We observe a universal behavior with scaling parameter $γ\simeq 0.51$. Interestingly this universal behavior is already encoded in the sonic horizon much before the black hole forms and therefore the emergence of the event horizon.
