Speaker
Aaron Held
Description
Renormalization-Group (RG) improvement has been applied to capture the effect of gravitational quantum corrections on cosmological and black-hole spacetimes. In this talk, I will use an algebraically complete set of curvature invariants to establish that (i) RG improvement at the level of the metric (or the equations of motion) is coordinate-dependent, while (ii) RG improvement at the level of curvature invariants (or the action) is coordinate-independent. Spherically-symmetric and axially-symmetric black-hole spacetimes serve as concrete and physically relevant examples.
