Islands and Uhlmann phase: explicit recovery of classical information from evaporating black holes

Recent work has established a route towards the semiclassical validity of Page curve, and so provided evidence that information escapes an evaporating black hole. However, protocol to explicitly recover make practical use in classical limit not yet been given. In this paper, we describe such protocol, showing observer may reconstruct phase space hole interior by measuring Uhlmann Hawking radiation. The process formation evaporation provides invertible map between initial matter configurations. Thus, all is recovered. We assume paper replica wormholes contribute gravitational path integral.