标题： 分层宇宙学中的密度扰动与原初黑洞 显示英文标题

标题： Density perturbations in braneworld cosmology and primordial black holes

摘要： 我们通过数值方法研究了Randall-Sundrum膜宇宙学辐射时代标量扰动的时间演化。我们的结果证实了最近发现的扰动振幅增强（接近视界穿越）的存在性。我们建议在高能状态下扰动理论方程的近似解，该解预测增强因子是尺度的渐近常数。我们讨论了这一结果在膜宇宙学原始黑洞产生的问题中的应用。 显示英文摘要

摘要： We study, by numerical methods, the time evolution of scalar perturbations in radiation era of Randall-Sundrum braneworld cosmology. Our results confirm an existence of the enhancement of perturbation amplitudes (near horizon crossing), discovered recently. We suggest the approximate solution of equations of the perturbation theory in the high energy regime, which predicts that the enhancement factor is asymptotically constant, as a function of scale. We discuss the application of this result for the problem of primordial black hole production in braneworld cosmology.