Speaker
Sk Jahanur Hoque
(Université Libre de Bruxelles, Belgium)
Description
Gravitational memory effect is the permanent displacement in the relative separation between freely falling particles resulting from the passage of gravitational wave train. We obtain a closed form expression for the linearized perturbation upto quadrupolar order around de Sitter space-times generated by spatially compact sources. We demonstrate that such a source causes a displacement memory effect close to future infinity. We also discuss a correspondence between memory effect and asymptotic symmetries of de Sitter.
Authors
Geoffrey Compère
(Universite Libre de Bruxelles)
Sk Jahanur Hoque
(Université Libre de Bruxelles, Belgium)
Emine Seyma Kutluk
(Scoula Normale Superiore, Italy)