Towards conditions for black-hole singularity-resolution in asymptotically safe quantum gravity

Understand

We explore the fate of the curvature singularity of Schwarzschild (deSitter) black holes in asymptotically safe quantum gravity.

• Specifically, we upgrade the classical spacetime by including the running of the Newton coupling and cosmological constant.
• In this setting, the antiscreening character of the gravitational interaction can remove the singularity, yet a nonzero value of the cosmological constant in the ultraviolet appears to reintroduce it.
• We find hints that a finite value of the cosmological constant in the infrared is compatible with singularity resolution provided that the cosmological constant is driven to zero fast enough in the ultraviolet.