论文标题
巨大的复杂标量场的关键重力崩溃
Critical gravitational collapse of a massive complex scalar field
论文作者
论文摘要
我们研究了最小与重力耦合的巨大复合体标量场的临界崩溃。作为初始数据，一个简单的高斯脉冲具有类似于玻色子星的谐波ansatz的形状，当改变高斯宽度$σ$时，我们会获得I型和II型的临界崩溃。对于$σ\ leq 0.5 $，我们发现II型的倒塌具有关键指数$γ= 0.38 \ pm0.01 $和回声周期$δ= 3.4 \ pm0.1 $。这些值与真正无质量标量场的已知结果非常相似。另一方面，对于$σ\ geq 2.5 $，我们获得了I型的崩溃。在这种情况下，我们发现关键解决方案在基态处是不稳定的玻色子恒星：从我们的模拟中获得的所有数据都可以与不稳定的玻色子星及其相应的Lyapunov代表的不稳定的玻色子星的特征值形成鲜明对比。
We study the critical collapse of a massive complex scalar field coupled minimally to gravity. Taking as initial data a simple gaussian pulse with a shape similar to the harmonic ansatz for boson stars, we obtain critical collapse of type type I and II when varying the gaussian width $σ$. For $σ\leq 0.5$ we find collapse of type II with a critical exponent $γ=0.38\pm0.01$ and an echoing period $Δ=3.4\pm0.1$. These values are very similar to the known results for a real massless scalar field. On the other hand, for $σ\geq 2.5$ we obtain collapse of type I. In this case we find that the critical solutions turn out to be an unstable boson stars in the ground state: all the data obtained from our simulations can be contrasted with the characteristic values for unstable boson stars and their corresponding Lyapunov exponents.
