Energy transport across interfaces in CFTs

Energy transmission across conformal interfaces between 2D CFTs is universal, the transmission coefficients do not depend on the shape and composition of the wave packet. Transmission and reflection coefficients in 2D can be expressed in terms of interface CFT parameters and computed via holographic methods. In higher dimensions the situation becomes much richer and more involved. I will present work in progress on computing energy transmission across interfaces in higher dimensional CFTs and comment on recent results for head-on collisions, explicitly deriving the transmission coefficients in 3D and 4D.