Dvali and Osmanov: Black Holes as Quantum Information Capacitors — A Speculative SETI Pathway

To the point

Gia Dvali and Zaza N. Osmanov argue that black holes are extremely efficient quantum information processors, so advanced civilizations might use black holes for quantum computing and emit Hawking radiation across all particle species—including hidden particles that interact only through gravity—creating detectable SETI signals on Earth.

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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.