Black-Hole Quantum Computers: Universal Information Storage, Hawking Signatures, and SETI Implications

To the point

Black holes can function as universal quantum computers that store information in many memory modes and emit Hawking radiation across all particle species, so advanced civilizations would use clusters of small black holes to boost information processing, producing detectable neutrino and gamma-ray signals that we could identify as technosignatures, a concept proposed by Gia Dvali and Zaza Osmanov.