报告题目：Primordial Black Hole Formation in Starobinsky’s Linear Potential Model
报 告 人：王嘉宁（博士），中科院理论物理研究所
邀 请 人：周思益
时 间： 2023年8月26号（星期六）16:00
地 点： 腾讯会议 和 重庆大学物理学院
Abstract: We study the power spectrum of the comoving curvature perturbation in the model that glues two linear potentials of different slopes, originally proposed by Starobinsky. We find that the enhanced power spectrum reaches its maximum at the wavenumber which is π times the junction scale. The peak is ∼ 2.61 times larger than the ultraviolet plateau. We also show that its near-peak behavior can be well approximated by a constant-roll model, once we define the effective ultra_x0002_slow-roll e-folding number appropriately by considering the contribution from non_x0002_single-clock phase only. Such an abrupt transition to non-attractor phase can leave some interesting characteristic features in the energy spectrum of the scalar-induced gravitational waves, which are detectable in the space-borne interferometers if theprimordial black holes generated at such a high peak are all the dark matter.
Brief CV: 王嘉宁，中国科学院理论物理研究所在读博士生。2019年6月本科毕业于山东大学，2019年9月录取为中国科学院理论物理研究所量子物理方向硕士研究生，2021年9月转为宇宙学方向攻读博士学位，导师为皮石研究员。
研究兴趣主要集中在早期宇宙学，特别是暴胀理论，原初黑洞的形成与演化等课题方向。作为通讯作者在JCAP发表学术论文1篇。
