Causal sets can approximate black hole horizons via discrete timelike curves and ladders tracing null geodesics, with a discrete expansion changing sign across the horizon in a 1+1D toy model.
Van de Moortel, Comptes Rendus
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Two families of regular hairy black holes are generated from Bardeen and Minkowski-core seeds using gravitational decoupling with an exponential profile, yielding de Sitter or flat cores, critical horizon parameters, and rotating extensions that satisfy the weak energy condition outside.
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Towards black-hole horizons and geodesic focusing in causal sets
Causal sets can approximate black hole horizons via discrete timelike curves and ladders tracing null geodesics, with a discrete expansion changing sign across the horizon in a 1+1D toy model.
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Regular hairy black holes by gravitational decoupling: Bardeen and Minkowski-core seeds
Two families of regular hairy black holes are generated from Bardeen and Minkowski-core seeds using gravitational decoupling with an exponential profile, yielding de Sitter or flat cores, critical horizon parameters, and rotating extensions that satisfy the weak energy condition outside.