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 …

In this paper, which is of programmatic rather than quantitative nature, we aim to further
delineate and sharpen the future potential of the LISA mission in the area of fundamental …

Horizon-scale images of black holes (BHs) and their shadows have opened an
unprecedented window onto tests of gravity and fundamental physics in the strong-field …

On August 17, 2017 at 12∶ 41: 04 UTC the Advanced LIGO and Advanced Virgo
gravitational-wave detectors made their first observation of a binary neutron star inspiral …

The discovery of the first pulsar in a binary star system, the Hulse–Taylor pulsar, 50 years
ago opened up an entirely new field of experimental gravity. For the first time it was possible …

The correlation of the tidal polarizabilities Λ 1-Λ 2 for GW170817 is predicted by combining
dense-matter equations of state (EOSs) that satisfy nuclear physics constraints with the chirp …

We review recent progress in massive gravity. We start by showing how different theories of
massive gravity emerge from a higher-dimensional theory of general relativity, leading to the …

The gravitational wave observations GW150914 and GW151226 by Advanced LIGO provide
the first opportunity to learn about physics in the extreme gravity environment of coalescing …

Asymptotic safety generalizes asymptotic freedom and could contribute to understanding
physics beyond the Standard Model. It is a candidate scenario to provide an ultraviolet …

One century after its formulation, Einstein's general relativity (GR) has made remarkable
predictions and turned out to be compatible with all experimental tests. Most of these tests …