Nuclear and Particle Physics Seminar - Shammi Tahura, PhD

Gravitational wave memory effects in scalar-tensor theories

Shammi Tahura, PhD

When gravitational waves pass through observers located far away from the source, they cause oscillatory distortions of the separations among the observers. There is one more interesting phenomenon that the gravitational waves can create lasting relative displacements of the observers, which is called the gravitational wave memory effect. This effect, tied to the infrared properties of gravity and other massless field theories, reveals insights into asymptotic symmetries and conserved quantities. In this talk, I will present the scalar-tensor theories in Bondi-Sachs form, discussing asymptotic symmetries, conserved charges, and the gravitational wave memory effects.