About
We consider primordial gravitational waves induced by large density perturbations generated by inflation in the very early universe. Cosmological alpha-attractors stand out as particularly compelling models to describe inflation, naturally meeting tight observational bounds from cosmic microwave background (CMB) experiments. We investigate alpha-attractor potentials in presence of an inflection point. The curvature perturbation is enhanced at high frequencies, which can lead to primordial black holes production and second-order gravitational waves. Consistency with the current CMB measurements implies that PBHs can only be produced with masses smaller than 10^8 g and are accompanied by ultra-high frequency gravitational waves, with a peak expected to be at frequencies of order 1MHz or above..
0:00:00 Slide 1
0:00:21 Slide 2
0:00:41 Slide 3
0:01:01 Slide 4
0:01:22 Slide 5
0:01:42 Slide 6
0:02:02 Slide 7
0:02:23 Slide 8
0:02:43 Slide 9
0:03:03 Slide 10
0:03:24 Slide 11
The talk
Credits and licence
- Institution
- CERN
- Department
- Conferences & Workshops
- Speaker
- Laura Iacconi
- Year
- 2021
- Language
- English
- Source
- CERN
- Licence
- CERN, as CERN states it. CERN's terms
- Attribution
- © CERN. CERN provides its audiovisual media free of charge for educational and informational use, credited to CERN; this lecture is shown in CERN's own player.
- Who can watch
- CERN gives no rating. Invisible Network shows it to Teens profiles and older, judged from what the source says about it. How courses are placed