Emergent times in holographic duality

In a series of two papers, the authors explore the holographic duality between an eternal AdS black hole in the bulk and two copies of the boundary CFT in the thermal field double state. They provide an explicit construction in the boundary theory of an evolution operator for a bulk in-falling observer, thus making manifest the boundary emergence of the black hole horizons, the interiors, and the associated causal structure. They also elucidate that the emergence of the sharp bulk event horizon is related to the infinite N limit of the boundary theory.