Complementarity and the unitarity of the black hole $S$-matrix

Understand

Recently, Akers et al.

• proposed a non-isometric holographic map from the interior of a black hole to its exterior.
• Within this model, we study properties of the black hole $S$-matrix, which are in principle accessible to observers who stay outside the black hole.
• Specifically, we investigate a scenario in which an infalling agent interacts with radiation both outside and inside the black hole.