论文标题
在背景磁场存在下，宇宙弦上的黑洞对产生
Black hole pair production on cosmic strings in the presence of a background magnetic field
论文作者
论文摘要
我们研究了在背景磁场存在下，在宇宙弦上的磁性带有带电的黑洞的创建。绳子可能会破裂或磨损，以产生恩斯特度量标准所描述的一对加速黑洞。通过使用Instanton动作，我们获得了这种生产的速率。对于大量背景磁场值，大型黑洞的产生可能是可能的。将我们的结果与没有弦的磁场中的黑洞对创建的情况进行比较，我们表明宇宙弦的磨损/破裂可以大大提高生产率。我们还使用WKB近似值在外部磁场中在宇宙弦上获得了宇宙弦上的单极抗抗斜杆对的结果，并将其与黑洞结果进行比较。我们还提供了一项在宇宙弦上在磁场存在的磁场上创建黑洞对的启发式研究，尽管缺乏ERNST度量标准的类似物，但缺乏具有宇宙学常数的类似物。像宇宙弦和/或背景磁场一样，正宇宙常数会提高生产率。
We investigate the pair creation of magnetically charged black holes on a cosmic string in the presence of a background magnetic field. The string may either break or fray to produce a pair of accelerating black holes described by Ernst metric. By using the instanton action we obtain the rate of such production. For large values of background magnetic field the production of large black holes is probable. Comparing our results with the case of black hole pair creation in magnetic field with no string, we show that fraying/breaking of the cosmic string can substantially enhance the production rate. We also obtain the result of monopole-antimonopole pair production on cosmic string in an external magnetic field, using the WKB approximation and compare it with the black hole results. We also provide a heuristic study of black hole pair creation on cosmic string in the presence of a magnetic field in the de Sitter background, although the analog of Ernst metric with a cosmological constant is lacking. Like a cosmic string and/or a background magnetic field, a positive cosmological constant increases the production rate.
