Phases of 4D Black Holes in Scalar-Tensor Theories of Gravity Coupled to Non-Linear Electrodynamics

摘要

In the present, work we find new non-unique, numerical solutions describing charged black holes coupled to non-linear electrodynamics in a special type of scalar-tensor theory. The solutions describe three phases of black holes, and each of them is characterized by the value of the asymptotic scalar-field charge. The presence of multiple phases implies that gravitational phase transition might occur, which is a non-trivial and poorly studied effect.