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On the inner horizon instability of non-singular black holes

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arxiv 2203.14516 v1 pith:OHD45E7R submitted 2022-03-28 gr-qc

Francesco Di Filippo , Raúl Carballo-Rubio , Stefano Liberati , Costantino Pacilio , Matt Visser This is my paper · ORCID
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Regular black holes represent a conservative model in which the classical singularity is replaced by a non-singular core without necessarily modifying the spacetime outside the trapping horizon. Given the possible lack of phenomenological signatures, it is crucial to study the consistency of the model. In this short work, we review the physical mechanism leading to the instability of the central core, arguing that non-perturbative backreaction is non-negligible and must be taken into account to provide a meaningful description of physical black holes.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Semiclassical regularity of compact trapped regions: From dynamical horizons to inner extremality

    gr-qc 2026-07 conditional novelty 7.0 of 10

    In finite-lifetime dynamical geometries the in-vacuum RSET stays finite at the inner horizon, growing exponentially for non-extremal cases but only as a power law for inner-extremal ones.

  2. Semiclassical Black Hole-White Hole transitions: an analytical treatment

    gr-qc 2026-08 conditional novelty 6.0 of 10

    The |in>-vacuum stress-energy in 2D collapse models amplifies at the inner horizon and can flip the ingoing null expansion, turning a trapped region into an anti-trapped one.

  3. Spectral Bifurcations in Quasinormal Modes of Regular BTZ Black Holes

    gr-qc 2026-03 conditional novelty 6.0 of 10

    For regular BTZ black holes from an infinite Lovelock tower, scalar quasinormal modes bifurcate from complex BTZ branches into purely imaginary branches as the regularization length ℓ grows, producing mode switching a...

  4. Dynamical black holes and accretion-induced backreaction

    gr-qc 2025-07 conditional novelty 4.0 of 10

    For accreting Reissner-Nordstrom black holes, the momentum flux from infalling matter splits an extremal horizon into two, while energy density displaces the extremal horizon's radius.

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