Scalarization is a mechanism that endows strongly self-gravitating bodies, such as neutron
stars and black holes, with a scalar-field configuration. It resembles a phase transition in that …

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 …

We show that self-interacting vector field theories exhibit unphysical behavior even when
they are not coupled to any external field. This means any theory featuring such vectors is in …

Exploring the nature of gravity in the strong curvature regime is seeing a surge of interest
lately. This is expected to intensify, as it is driven by current and future observations of …

Gravitational wave observations have great potential to reveal new information about the
fundamental nature of gravity, but extracting that information can be difficult. One popular …

It has been argued that a self-interacting massive vector field is pathological due to a
dynamical formation of a singular effective metric of the vector field, which is the onset of a …

Self-interacting vectors are seeing a burst of interest where various groups demonstrated
that the field evolution ends in finite time. Two nonequivalent criteria have been offered to …

Numerical simulations of the Cauchy problem for self-interacting massive vector fields often
face instabilities and apparent pathologies. We explicitly demonstrate that these issues …

In the framework of f (R, T) theory, this paper develops two unique non-singular interior
models that describe anisotropic spherical structures in the presence of an electromagnetic …

In certain scalar-field extensions to general relativity, scalar charges can develop on
compact objects in an inspiraling binary—an effect known as dynamical scalarization. This …