Extended Uncertainty Principle Black Holes: Prospects for the Event Horizon Telescope

by Jonas Mureika

Tuesday 25 Mar 2025, 15:00 → 16:00 Europe/Rome

2G26

An Extended Uncertainty Principle (EUP) inspired Schwarzschild metric that allows for large-scale modifications to gravitation is presented. At a new fundamental length scale L, the horizon is corrected by an additional term of the form R_S^3 / L*^2. This alters the typical characteristics of black holes, including matter and photon orbits, which in turn affects the accretion disk and black hole shadow. If the scale L* is on the order of at least 10^13 m, the EUP becomes relevant for black holes of mass greater than 10^6 solar masses. This includes most known supermassive black holes and thus presents a unique set of experimental signatures that could be tested by the Event Horizon Telescope and similar future collaborations. EUP modifications in the weak field and cosmological limits are also discussed, which could provide a link to dark matter and energy.