We provide a review on the state-of-the-art of gravitational waves induced by primordial
fluctuations, so-called induced gravitational waves. We present the intuitive physics behind …

Gravitational waves are a unique probe of the early Universe, as the Universe is transparent
to gravitational radiation right back to the end of inflation. This review summarizes detection …

Pulsar timing arrays gathered evidence of the presence of a gravitational wave background
around nHz frequencies. If the gravitational wave background was induced by large and …

The recently released data by pulsar timing array (PTA) collaborations have amassed
substantial evidence corroborating the existence of a stochastic signal consistent with a …

In this Letter, we derive for the first time a characteristic three-peaked GW signal within the
framework of no-scale Supergravity, being the low-energy limit of Superstring theory. We …

The gravitational potential of initially Poisson distributed primordial black holes (PBH) can
induce a stochastic gravitational-wave background (SGWB) at second order in cosmological …

Primordial black holes (PBHs) and the violation of the null energy condition (NEC) have
significant implications for our understanding of the very early Universe. We present a novel …

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 …

A bstract Hawking evaporation of primordial black holes (PBHs) can facilitate the generation
of matter-antimatter asymmetry. We focus on ultra-low mass PBHs that briefly dominate the …

Primordial black holes are under intense scrutiny since the detection of gravitational waves
from mergers of Solar-mass black holes in 2015. More recently, the development of …