The Weak Gravity Conjecture holds that in a theory of quantum gravity, any gauge force
must mediate interactions stronger than gravity for some particles. This statement has …

The weak gravity conjecture holds that in a theory of quantum gravity any gauge force must
mediate interactions stronger than gravity for some particles. This statement has surprisingly …

We show that perturbations of a scalar field in the background of the spherically symmetric
black hole obtained with the Starobinsky-Bel-Robinson Gravity are unstable unless the …

It was recently shown that strong cosmic censorship may be violated in highly charged black-
hole spacetimes living in a universe with a positive cosmological constant. Several follow-up …

Recently it has been argued that the phantom thin-shell wormholes matched with the
Schwarzschild space-time near the Schwarzschild radius ring like Schwarzschild black …

Scalar fields confined either by a mass term or by a mirrorlike boundary condition have
unstable modes in the background of a Kerr black hole. Assuming a time dependence as ei …

The Bardeen black hole stands as the first model of a regular black hole. Driven by the
interpretations of Bardeen spacetime as a quantum-corrected Schwarzschild-like solution …

It is shown that Kerr-Newman black holes can support linear charged scalar fields in their
exterior regions. To that end, we solve analytically the Klein-Gordon wave equation for a …

After recent observational events like the LIGO-Virgo detections of gravitational waves and
the shadow image of the M87* supermassive black hole by event horizon telescope (EHT) …

Frequency domain studies have recently demonstrated that charged scalar fields exhibit fast
growing superradiant instabilities when interacting with charged black holes in a cavity …