Jia-Zhou Liu

Black hole entropy beyond the wald term in nonminimally coupled gravity: a covariant phase space decomposition

Abstract We study the entropy of static, spherically symmetric black holes in diffeomorphism-invariant theories with nonminimal matter–curvature couplings, using the covariant phase space formalism. For regular bifurcate Killing horizons, the Iyer–Wald construction gives the stan...

Quasinormal modes of a charged spherically symmetric black hole in bumblebee gravity

Abstract Lorentz symmetry may be violated at the Planck scale. In the bumblebee model, a vector field acquires a nonzero vacuum expectation value, spontaneously breaking Lorentz symmetry. We study quasinormal modes of a charged spherically symmetric black hole in this framework,...