Diffuse gamma-ray and neutrino data, plus CMB ionization limits, constrain the memory-burden parameters k, q, and delta for primordial black holes and narrow viable dark matter masses to a broad but testable window.
Black Hole Macro-Quantumness
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abstract
It is a common wisdom that properties of macroscopic bodies are well described by (semi)classical physics. As we have suggested this wisdom is not applicable to black holes. Despite being macroscopic, black holes are quantum objects. They represent Bose-Einstein condensates of N-soft gravitons at the quantum critical point, where N Bogoliubov modes become gapless. As a result, physics governing arbitrarily-large black holes (e.g., of galactic size) is a quantum physics of the collective Bogoiliubov modes. This fact introduces a new intrinsically-quantum corrections in form of 1/N, as opposed to exp(-N). These corrections are unaccounted by the usual semiclassical expansion in h and cannot be recast in form of a quantum back-reaction to classical metric. Instead the metric itself becomes an approximate entity. These 1/N corrections abolish the presumed properties of black holes, such as non existence of hair, and are the key to nullifying the so-called information paradox.
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The fast, the slow and the merging: probes of evaporating memory burdened PBHs
Diffuse gamma-ray and neutrino data, plus CMB ionization limits, constrain the memory-burden parameters k, q, and delta for primordial black holes and narrow viable dark matter masses to a broad but testable window.