Massive vector fields feature in several areas of particle physics, eg, as carriers of weak
interactions, dark matter candidates, or an effective description of photons in a plasma. Here …

Particular couplings between a scalar field and the Gauss-Bonnet invariant lead to
spontaneous scalarization of black holes. Here, we continue our work on simulating this …

We present the tensor computer algebra package xTras, which provides functions and
methods frequently needed when doing (classical) field theory. Amongst others, it can …

Weinberg's asymptotic safety scenario provides an elegant mechanism to construct a
quantum theory of gravity within the framework of quantum field theory based on a non …

The response of black holes to small perturbations is known to be partially described by a
superposition of quasinormal modes. Despite their importance to enable strong-field tests of …

The complicated nature of calculations in general relativity was one of the driving forces in
the early development of computer algebra (CA). CA has become widely used in gravity …

Over the last years the asymptotic safety program has matured into a serious candidate for a
quantum theory of gravity compatible with observations. The rapid technical progress in …

Current observations present unprecedented opportunities to probe the true nature of black
holes, which must harbor new physics beyond General Relativity to provide singularity-free …

We present the tensor computer algebra package xPert for fast construction and
manipulation of the equations of metric perturbation theory, around arbitrary backgrounds. It …

A bstract Asymptotic Safety provides an elegant mechanism for obtaining a consistent high-
energy completion of gravity and gravity-matter systems. Following the initial idea by Steven …