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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 |
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Institute of Theoretical Physics |
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Chinese Academy of Sciences |
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Seminar |
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Title
题目 |
Primordial black holes from ultra-slow-roll inflation |
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Speaker
报告人 |
龚云贵 |
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Affiliation
所在单位 |
华中科技大学物理学院 |
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Date
日期 |
2017-11-10 14:00 |
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Venue
地点 |
Room 6420, ITP NEW BUILDING |
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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. |
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Contact person
所内联系人 |
郭宗宽 |
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