It has been recently proposed that Hawking evaporation might slow down after a black hole
has lost about half of its mass. Such an effect, called" memory burden", is parameterized as …

In this work, we present the first experimental upper limits on the presence of stochastic
gravitational waves in a frequency band with frequencies above 1 THz. We exclude …

If primordial black holes (PBHs) had come to dominate the energy density of the early
Universe when oscillations in the axion field began, we show that the relic abundance and …

The evaporation of primordial black holes (PBH) with masses ranging from~ 10-1 to~ 10 9 g
could have generated the whole observed dark matter (DM) relic density. It is typically …

Ultra-light primordial black holes with masses M BH< 10 9 g evaporate before big-bang
nucleosynthesis producing all matter fields, including dark matter, in particular super-heavy …

We consider a cosmological scenario in which the very early Universe experienced a
transient epoch of matter domination due to the formation of a large population of primordial …

We apply the inverse Gertsenshtein effect, ie, the graviton-photon conversion in the
presence of a magnetic field, to constrain high-frequency gravitational waves (HFGWs) …