A bstract We study black hole linear perturbation theory in a four-dimensional Schwarzschild
(anti) de Sitter background. When dealing with a positive cosmological constant, the …

We present new analytic results on black hole perturbation theory. Our results are based on
a novel relation to four-dimensional N= 2 N= 2 supersymmetric gauge theories. We propose …

We present an exact formula for the thermal scalar two-point function in four-dimensional
holographic conformal field theories. The problem of finding it reduces to the analysis of the …

A bstract We study the quasinormal modes (QNM) of the charged C-metric, which physically
stands for a charged accelerating black hole, with the help of Nekrasov's partition function of …

A bstract We exploit the recently proposed correspondence between gravitational
perturbations and quantum Seiberg-Witten curves to compute the spectrum of quasi-normal …

We compute new exact analytic expressions for one-loop scalar effective actions in Kerr (A)
dS black hole (BH) backgrounds in four and five dimensions. These are computed by the …

QNMs govern the linear response to perturbations of BHs, D-branes and fuzzballs and the
gravitational wave signals in the ring-down phase of binary mergers. A remarkable …

We obtain analytic and numerical results for the non-perturbative amplitudes of topological
string theory on arbitrary, compact Calabi-Yau manifolds. Our approach is based on the …

This review describes a link between Lax operators, embedded surfaces and
thermodynamic Bethe ansatz equations for integrable quantum field theories. This surprising …

A bstract We perform a detailed study of perturbations around 2-charge circular fuzz-balls
and compare the results with the ones obtained in the case of 'small'BHs. In addition to the …