A Stationary Black Hole Must be Axisymmetric in Effective Field Theory
A Stationary Black Hole Must be Axisymmetric in Effective Field Theory
The black hole rigidity theorem asserts that a rotating stationary black hole must be axisymmetric. This theorem holds for General Relativity with suitable matter fields, in four or more dimensions. We show that the theorem can be extended to any diffeomorphism invariant theory of vacuum gravity, assuming that this is …