Speaker
Cheng Cheng
(Center for Physical Sciences and Technology (FTMC))
Description
The early universe may have experienced a kination epoch - a phase where a scalar field's kinetic energy dominates the expansion. In this talk, I will outline how scalar-field inhomogeneities during this era can trigger strong non-linear dynamics, and how these can collapse to form primordial black holes (PBHs). Based on numerical relativity simulations, I will show the conditions under which super-horizon perturbations grow non-perturbatively and the critical initial conditions for PBH formation. I will discuss how a non-standard background like kination opens new pathways for PBH formation and the cosmological implications.
| Other topic / keywords: | Primordial Black Holes, Kination |
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Author
Cheng Cheng
(Center for Physical Sciences and Technology (FTMC))