Abstract The Laser Interferometer Space Antenna (LISA) has the potential to reveal wonders
about the fundamental theory of nature at play in the extreme gravity regime, where the …

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 …

Scalar fields coupled to the Gauss-Bonnet invariant can undergo a tachyonic instability,
leading to spontaneous scalarization of black holes. Studies of this effect have so far been …

We study the nonlinear dynamics of binary black hole systems with scalar charge by
numerically evolving the full equations of motion for shift-symmetric Einstein scalar Gauss …

Detecting gravitational waves from coalescing compact binaries allows us to explore the
dynamical, nonlinear regime of general relativity and constrain modifications to it. Some of …

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 …

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 …

We show that the most general scalar-tensor theory of gravity up to four derivatives in 3+ 1
dimensions is well-posed in a modified version of the CCZ4 formulation of the Einstein …

The interaction of binary black hole mergers with their environments can be studied using
numerical relativity simulations. These start only a short finite time before merger, at which …