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Primordial black holes from ultra-slow-roll inflation
2017-11-10  【 】【打印】【关闭

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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