Speaker
Description
Mounting theoretical evidence suggests that the information stored in black holes suppresses their evaporation rate – a quantum effect known as memory burden. This phenomenon opens up a new window for small primordial black holes (PBHs) below $10^{15}\, \text{g}$ as viable dark matter candidates. In this talk, I will discuss observational signals from such small PBHs. Beyond constraints from BBN and CMB, the strongest bounds arise from present-day fluxes of astrophysical particles. Intriguingly, small PBHs that are currently transitioning from semi-classical evaporation to the memory-burdened phase are detectable through high-energetic neutrino events. Finally, I will highlight how inflationary production of small PBHs gives rise to high-frequency gravitational waves that can be observable in the future.
Based on:
G. Dvali, M. Zantedeschi, S. Z., Transitioning to Memory Burden: Detectable Small Primordial Black Holes as Dark Matter, arXiv:2503.21740.
W. Barker, B. Gladwyn, S. Z., Inflationary and Gravitational Wave Signatures of Small Primordial Black Holes as Dark Matter, arXiv:2410.11948, accepted for publication in Phys. Rev. D.
