A bstract Perturbations of massless fields in the Kerr-Newman black hole background enjoy
a (“Love”) SL (2, ℝ) symmetry in the suitably defined near zone approximation. We present a …

A bstract We study the near-zone symmetries of a massless scalar field on four-dimensional
black hole backgrounds. We provide a geometric understanding that unifies various recently …

A bstract The near-zone “Love” symmetry resolves the naturalness issue of black hole Love
number vanishing with SL (2, ℝ) representation theory. Here, we generalize this proposal to …

Tidal Love numbers describe the linear response of a compact object under the presence of
external tidal perturbations, and they are found to vanish exactly for black holes within …

In this note, we present a synopsis of geometric symmetries for (spin 0) perturbations around
(4D) black holes and de Sitter space. For black holes, we focus on static perturbations, for …

We develop a framework to compute the tidal response of a Kerr-like compact object in
terms of its reflectivity, compactness, and spin, both in the static and the frequency …

It is well known that asymptotically flat Schwarzschild black holes in general relativity in four
spacetime dimensions have vanishing induced linear tidal response. We extend this result …

A bstract The static Love numbers of four-dimensional asymptotically flat, isolated, general-
relativistic black holes are known to be identically vanishing. The Love symmetry proposal …

Detecting subsolar objects in black hole binary mergers is considered a smoking gun
signature of primordial black holes. Their supposedly vanishing tidal Love number is …

A set of tidal Love numbers quantifies tidal deformation of compact objects and is a
detectable imprint in gravitational waves from inspiraling binary systems. The measurement …