We update the constraints on the fraction of the Universe that may have gone into primordial
black holes (PBHs) over the mass range 10− 5 to 10 50 g. Those smaller than∼ 10 15 g …

This article reviews current understanding of primordial black holes (PBHs), with particular
focus on those massive examples ($\gtrsim $$10^{15}~{\rm g} $) which remain at the …

A bstract When absorbing boundary conditions are used to evaporate a black hole in
AdS/CFT, we show that there is a phase transition in the location of the quantum Ryu …

Primordial black holes (PBHs) represent a natural candidate for one of the components of
the dark matter (DM) in the Universe. In this review, we shall discuss the basics of their …

The detection of gravitational waves from mergers of tens of Solar mass black hole binaries
has led to a surge in interest in primordial black holes (PBHs) as a dark matter candidate …

The entropy of a black hole and Hawking radiation should have the same temperature given
by the surface gravity, within a numerical factor of the order of unity. In addition, Hawking …

The International Gamma-Ray Astrophysics Laboratory (INTEGRAL) satellite has yielded
unprecedented measurements of the soft gamma-ray spectrum of our Galaxy. Here we use …

Macroscopic objects, as we see them all around us, are governed by a variety of forces,
derived from a variety of approximations to a variety of physical theories. In contrast, the only …

A bstract We study the Page curve for asymptotically flat eternal Schwarzschild black holes
in four and higher spacetime dimensions. Before the Page time, the entanglement entropy …

We derive the strongest constraint on the fraction of dark matter that can be composed of low
mass primordial black holes by using the observation of the Galactic Center 511 keV γ-ray …