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| Primordial black holes from ultra-slow-roll inflation |
| 2017-11-10
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| CAS Key Laboratory of Theoretical Physics | | Institute of Theoretical Physics | | Chinese Academy of Sciences | | Seminar | | Title 题目 | Primordial black holes from ultra-slow-roll inflation | | Speaker 报告人 | 龚云贵 | | Affiliation 所在单位 | 华中科技大学物理学院 | | Date 日期 | 2017-11-10 14:00 | | Venue 地点 | Room 6420, ITP NEW BUILDING | | Abstract 摘要 | The next generation of space-borne gravitational wave detectors may detect gravitational waves from extreme mass-ratio inspirals with primordial black holes. To produce primordial black holes which contribute a non-negligible abundance of dark matter and are consistent with the observations, a large enhancement in the primordial curvature power spectrum is needed. For a single field slow-roll inflation, the enhancement requires a very flat potential for the inflaton, and this will increase the number of $e$-folds. To avoid the problem, an ultra-slow-roll inflation at the near inflection point is required. We elaborate the conditions to successfully produce primordial black hole dark matter from inflation and propose a toy model with polynomial potential to show the result. | | Contact person 所内联系人 | 郭宗宽 |
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