Black hole information paradox

According to Einstein’s theory of gravity, black holes have only a small handful of distinguishing characteristics. Quantum theory implies they may have more. Now an experimental search finds that any of this extra ‘hair’ has to be pretty short.

Inside of a black hole, the two theoretical pillars of 20th-century physics appear to clash. Now a group of young physicists think they have resolved the conflict by appealing to the central pillar of the new century — the physics of quantum information.

The puzzling behavior of black hole interiors has led researchers to propose a new physical law: the second law of quantum complexity.

New calculations suggest that the event horizons around black holes will ‘decohere’ quantum possibilities — even those that are far away.

The unprecedented experiment explores the possibility that space-time somehow emerges from quantum information.

The “gravitational memory effect” predicts that a passing gravitational wave should forever alter the structure of space-time. Physicists have linked the phenomenon to fundamental cosmic symmetries and a potential solution to the black hole information paradox.

The five-decade-old paradox — long thought key to linking quantum theory with Einstein’s theory of gravity — is falling to a new generation of thinkers. Netta Engelhardt is leading the way.

A new study shows that extreme black holes could break the famous “no-hair” theorem, and in a way that we could detect.

Featuring paradoxical black holes, room-temperature superconductors and a new escape from the prison of time.