The “gravitational memory effect” due to an exact plane wave provides us with an
elementary description of the diffeomorphisms associated with the analogue of “soft …

The usual gravitational wave memory effect can be understood as a change in the
separation of two initially comoving observers due to a burst of gravitational waves. Over the …

A bstract We show that large gauge transformations modify the structure of momentum
conservation leading to non-vanishing three-point amplitudes in a simple toy model of a …

The gravitational wave memory effect is characterized by the permanent relative
displacement of a pair of initially comoving test particles that is caused by the passage of a …

We use Penrose limits to approximate quasinormal modes (QNMs) with large real
frequencies. The Penrose limit associates a plane wave to a region of spacetime near a null …

Gravitational wave memory is said to arise when a gravitational wave burst produces
changes in a physical system that persist even after that wave has passed. This paper …

A bstract The geometric description of gravitational memory for strong gravitational waves is
developed, with particular focus on shockwaves and their spinning analogues, gyratons …

We embed the Penrose limit into the Weyl classical double copy. Thereby, we provide a lift
of the double copy properties of plane wave spacetimes into black hole geometries and we …

The isometries of an exact plane gravitational wave are symmetries for both massive and
massless particles. Their conformal extensions are, in fact, chrono-projective transformations …

It has long been known that gravitational waves from compact binary coalescing sources are
responsible for a first-order displacement memory effect experienced by a pair of freely …