44 citations · 113 across the 12 of their papers we have counts for
17 papers
Approaching a dynamical extreme black hole horizon
Achilleas P. Porfyriadis, Christopher Rosen, Georgios Tsaraktsidis
We give an explicit closed form description of the late-time near-horizon approach to dynamical extreme Reissner-Nordstrom (DERN) black holes. These are spherically symmetric dynam…
Holographic shear correlators at low temperatures, and quantum
Alexandros Kanargias, Elias Kiritsis, Sameer Murthy +2
The strongly-coupled 3-dimensional theory, holographically dual to black branes at fixed chemical potential $\muext$ and temperature is considered in AdS Einstein-Max…
Scalar field scattering in a Schwarzschild-de Sitter geometry
Marco de Cesare, Marcello Miranda, Achilleas P. Porfyriadis
We solve analytically the low-frequency s-wave dynamics of a massless scalar field propagating on a Schwarzschild-de Sitter black hole background. A rigorous application of the met…
Connecting Gravitational Perturbations: from Bertotti-Robinson to Extreme Reissner-Nordstrom
Marco de Cesare, Roberto Oliveri, Achilleas P. Porfyriadis
We study spherically symmetric spacetime perturbations induced by a neutral scalar in the near-horizon region of extreme Reissner-Nordstrom black holes. For the unperturbed black h…
Accidental Symmetry Near Extreme Spinning Black Holes
Avik Banerjee, Achilleas P. Porfyriadis, Grant N. Remmen
Near the horizon of extremal charged black holes, an accidental symmetry is known to act on zero-temperature perturbations, transforming them into finite-temperature ones. In this…
Charged Dilatonic Spacetimes in String Theory
Achilleas P. Porfyriadis, Grant N. Remmen
We construct and study general static, spherically symmetric, magnetically charged solutions in Einstein-Maxwell-dilaton gravity in four dimensions. That is, taking Einstein gravit…