Gr.IV seminar: Achilleas Porfyriadis - "Approaching a dynamical extreme black hole horizon"

Wednesday Mar 25, 2026, 4:00 PM → 5:00 PM Europe/Rome

There exist dynamical extreme Reissner-Nordstrom (DERN) black holes. These are spherically symmetric dynamical solutions of Einstein-Maxwell theory coupled to a neutral scalar that feature: (i) a spacetime metric which tends to that of a static extreme Reissner-Nordstrom (RN), and (ii) a scalar field which exhibits the linear Aretakis instability ad infinitum in the non-linear theory. We employ the two-dimensional Jackiw-Teitelboim (JT) gravity to give an explicit closed form description of the late-time near-horizon approach to DERN.