论文标题
黑洞通过非界宇宙弹跳的演变
Evolution of black holes through a nonsingular cosmological bounce
论文作者
论文摘要
我们研究非宇宙弹跳期间黑洞的经典动态。采用由鬼和普通标量场的组合驱动的非弹跳宇宙学模型的简单模型，我们使用爱因斯坦方程的非线性演变跟随旋转和非旋转的黑洞通过反弹。无效能量条件的违规使黑洞事件的地面缩小，我们发现，对于足够大的黑洞（相对于最小哈勃半径），黑洞的明显地平线在收缩阶段可能会消失。尽管如此，我们表明，大多数局部宇宙进化仍然不受黑洞的存在影响。我们发现，与黑洞的初始质量无关，黑洞的事件范围在整个弹跳过程中持续存在，并且较晚的时间动态由一个扩展的宇宙组成，其黑洞的质量与其初始值相当。
We study the classical dynamics of black holes during a nonsingular cosmological bounce. Taking a simple model of a nonsingular bouncing cosmology driven by the combination of a ghost and ordinary scalar field, we use nonlinear evolutions of the Einstein equations to follow rotating and non-rotating black holes of different sizes through the bounce. The violation of the null energy condition allows for a shrinking black hole event horizon and we find that for sufficiently large black holes (relative to the minimum Hubble radius) the black hole apparent horizon can disappear during the contraction phase. Despite this, we show that most of the local cosmological evolution remains largely unaffected by the presence of the black hole. We find that, independently of the black hole's initial mass, the black hole's event horizon persists throughout the bounce, and the late time dynamics consists of an expanding universe with a black hole of mass comparable to its initial value.
