If you ever manage to fall into a black hole, new calculations show you may actually come out the other side. Via QuantaMagazine (From 2020)
groups for their geographical affiliations—posted their work showing that this trick allows them to reproduce the Page curve. In this way, they confirmed that the radiation spirits away the informational content of whatever falls into the black hole. String theory needn’t be true; even a staunch critic of string theory can get on board with the gravitational path integral. Still, as sophisticated as the analysis is, it doesn’t yet say how the information makes its getaway.
Juan Maldacena has spent over two decades at the center of efforts to understand information in and around black holes.Theorists have been intensely debating how literally to take all these wormholes. The wormholes are so deeply buried in the equations that their connection to reality seems tenuous, yet they do have tangible consequences.
All this reinforces many physicists’ hunch that space-time is not the root level of nature, but instead emerges from some underlying mechanism that is not spatial or temporal. To many, that was the main lesson of the AdS/CFT duality. The new calculations say much the same thing, but without committing to the duality or to string theory. Wormholes crop up because they are the only language the path integral can use to convey that space is breaking down.
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