activity
20232026
most citedOn the origin of quasinormal modes in semi-open systems

7 citations · 11 across the 9 of their papers we have counts for

collaborators

9 papers

gr-qc2026

End state of the experimental black-hole bomb

Patrik Švančara, Leonardo Solidoro, Pietro Smaniotto +10

Rotating black holes can amplify incident waves through superradiant scattering. When these waves are confined, repeated amplification gives rise to the black-hole bomb instability…

hep-th2026

Properties of black holes in non-linear electrodynamics

Lewis Croney, Ruth Gregory, Ansh Gupta +1

We investigate the properties of charged black hole geometries in nonlinear electrodynamics. We focus on the recently reported analytic charged black hole solutions to illustrate t…

physics.flu-dyn2025

When is a sloshing vortex an analogue black hole bomb?

Sam Patrick, Leonardo Solidoro, Maurício Richartz +4

Draining vortices provide a powerful platform for simulating black hole phenomena in tabletop experiments. In realistic fluid systems confined within a finite container, low-freque…

hep-th2025★ 3 cited

Thermodynamics of dyonic black holes in non-linear electrodynamics

Lewis Croney, Ruth Gregory, Carlos J. Ramírez-Valdez

We investigate dyonic black holes in a weak field expansion of non-linear electrodynamics. The breadth of parameter space permits a rich thermodynamic structure, additional turning…

gr-qc2025

Black-hole spectroscopy from a giant quantum vortex

Pietro Smaniotto, Leonardo Solidoro, Patrik Švančara +5

Black-hole spectroscopy aims to infer the fundamental properties of black holes by analysing the spectrum of gravitational waves emitted as they settle into equilibrium. These reso…

hep-th2024★ 1 cited

Ultra slow-roll with a black hole

Lewis Croney, Ruth Gregory, Sam Patrick

We investigate ultra slow-roll inflation with a seed black hole in a de Sitter background. By numerically tracking transitions from slow-roll to ultra slow-roll inflation, we find…

gr-qc2024★ 7 cited

On the origin of quasinormal modes in semi-open systems

Leonardo Solidoro, Sam Patrick, Ruth Gregory +1

Astrophysical black holes are open systems which, when perturbed, radiate quasi-normal modes (QNMs) to infinity. By contrast, laboratory analogues are necessarily finite-sized, pre…

hep-th2024

Testing Higher Derivative Gravity Through Tunnelling

Ruth Gregory, Shi-Qian Hu

Higher derivative terms in the gravitational action are natural from the perspective of quantum gravity, but are perceived as leading to a lack of well-posedness. The Gauss Bonnet…

physics.optics2023

Quasinormal Modes of Optical Solitons

Christopher Burgess, Sam Patrick, Theo Torres +2

Quasinormal modes (QNMs) are essential for understanding the stability and resonances of open systems, with increasing prominence in black hole physics. We present here the first s…