Université de GenèveDépartement de Physique ThéoriqueCAP Genève

Primordial Black Holes from Inflation and Quantum Diffusion

19. April 2018
Cite as: 
M. Biagetti, G. Franciolini, A. Kehagias, A. Riotto [arXiv:1804.07124].

Primordial black holes as dark matter may be generated in single-field models of inflation thanks to the enhancement at small scales of the comoving curvature perturbation. This mechanism requires leaving the slow-roll phase to enter a non-attractor phase during which the inflaton travels across a plateau and its velocity drops down exponentially. We argue that quantum diffusion has a significant impact on the primordial black hole mass fraction making the classical standard prediction not trustable.


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