Testing Loop Quantum Gravity from Observational Consequences of Nonsingular Rotating Black Holes

Destroying the event horizon of a nonsingular rotating quantum-corrected black hole

“…Recently, using the revised Newman-Janis algorithm, a nonsingular rotating loop gravity black hole solution has been constructed. This black hole solution can be regarded as a quantum correction of a Kerr black hole characterized by a small quantum parameter, and captures universal features of an effective nonsingular rotating black hole in loop quantum gravity [56].…”

“…Starting at a static spherically symmetric black hole in loop quantum gravity as a seed metric, Brahma et al constructed a rotating black hole in loop quantum gravity using the revised Newman-Janis algorithm. The metric captures universal features of an effective nonsingular rotating black hole in loop quantum gravity [56]. The metric for the black hole in Boyer-Lindquist coordinates can be written in the form [56]…”

“…The metric captures universal features of an effective nonsingular rotating black hole in loop quantum gravity [56]. The metric for the black hole in Boyer-Lindquist coordinates can be written in the form [56]…”

“…/2 is a nonnegative dimensionless parameter, where the quantum parameter λ k originates from holonomy modifications [51,52] and it is directly related to the fundamental area gap in the theory [56].…”

“…The metric approaches a Kerr spacetime asymptotically at |r| → +∞, and recovers to a static spherically symmetric black hole solution in loop quantum gravity when the spin parameter a vanishes. Moreover, the metric describes a flat spacetime for a = 0 and M = 0 [58], satisfying an essential consistency check lacking in some quantum gravity inspired solutions [56,59].…”