The exploration of the universe has recently entered a new era thanks to the multi-
messenger paradigm, characterized by a continuous increase in the quantity and quality of …

The observation of the inspiral and merger of compact binaries by the LIGO/Virgo
collaboration ushered in a new era in the study of strong-field gravity. We review current and …

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 …

This review is focused on tests of Einstein's theory of general relativity with gravitational
waves that are detectable by ground-based interferometers and pulsar-timing experiments …

We review the question of whether the fundamental laws of nature limit our ability to probe
arbitrarily short distances. First, we examine what insights can be gained from thought …

Abstract We investigate the Klein–Gordon quantum oscillator in a global monopole space–
time with three versions of rainbow gravity. We solve the related Klein–Gordon equation …

We propose a modification of special relativity in which a physical energy, which may be the
Planck energy, joins the speed of light as an invariant, in spite of a complete relativity of …

General relativity has passed all solar system experiments and neutron star based tests,
such as binary pulsar observations, with flying colors. A more exotic arena for testing …

I review the current status of phenomenological programs inspired by quantum-spacetime
research. I stress in particular the significance of results establishing that certain data …

The hypothesis that the Lorentz transformations may be modified at Planck scale energies is
further explored. We present a general formalism for theories which preserve the relativity of …