Speaker
Description
Mounting theoretical evidence suggests that the information stored in black holes suppresses their decay rate. This effect of memory burden opens up a new window for small primordial black holes (PBHs) below $10^{15}\,{\rm g}$ as dark matter candidates. In this talk, I show that the smooth transition from semi-classical evaporation to the memory-burdened phase strongly impacts observational bounds on the abundance of small PBHs. The most stringent constraints come from present-day fluxes of astrophysical particles and point towards an early onset of memory burden, after losing only a small fraction of the initial mass. Remarkably, currently-transitioning small PBHs are detectable through high-energetic neutrino events.
Based on:
G. Dvali, M. Zantedeschi, S. Z., Transitioning to Memory Burden: Detectable Small Primordial Black Holes as Dark Matter, arXiv:2503.21740.
M. Michel, S. Z., The Timescales of Quantum Breaking, Fortsch. Phys. 71 (2023) 2300163, arXiv:2306.09410. [Accompanying news article “Where is the boundary to the quantum world?”]
G. Dvali, L. Eisemann, M. Michel, S. Z., Black hole metamorphosis and stabilization by memory burden, Phys. Rev. D 102 (2020) 103523, arXiv:2006.00011.
