Black Holes as Efficient Quantum Information Capacitors: SETI Implications and Hidden-Sector Civilizations

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Black holes could serve as extremely efficient quantum information storage and processing devices for advanced civilizations, emitting detectable Hawking radiation that includes ordinary particles like neutrinos and photons, which opens new SETI avenues even for civilizations made entirely of hidden particles that interact with us only via gravity.

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Black holes as tools for quantum computing by advanced extraterrestrial civilizations
arxiv.org

Black holes as tools for quantum computing by advanced extraterrestrial civilizations

We explain that black holes are the most efficient capacitors of quantum information. It is thereby expected that all sufficiently advanced civilizations ultimately employ black holes in their quantum computers. The accompanying Hawking radiation is democratic in particle species. Due to this, the alien quantum computers will radiate in ordinary particles such as neutrinos and photons within the range of potential sensitivity of our detectors. This offers a new avenue for SETI, including the civilizations entirely composed of hidden particles species interacting with our world exclusively through gravity.