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Classical mass inflation vs semiclassical inner horizon inflation

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arxiv 2203.13539 v1 pith:FT3Q6GYT submitted 2022-03-25 gr-qc hep-th

classification gr-qchep-th
keywords horizoninnerinflationclassicalmasssemiclassicalanalysegeometry
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We analyse the geometry of a spherically symmetric black hole with an inner and outer apparent horizon which is perturbed by spherical null shells of matter. On a classical level we observe that the mass inflation instability is triggered, resulting in a growth of curvature and an inward displacement of the inner horizon. We study in detail the inner structure of the mass-inflated region and compare it with previous results obtained for the case in which the perturbing matter content has a continuous distribution. We then perform an approximate calculation of the renormalised stress-energy tensor of a quantum field in the vicinity of the inner horizon, and analyse the semiclassical backreaction on this region of the geometry. We find that the classical tendency for this horizon to move inward due to mass inflation is challenged and potentially overcome by a semiclassical tendency for it to inflate outward.

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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. Inner horizon instability via the trace anomaly effective action

    gr-qc 2024-11 conditional novelty 6.0 of 10

    The anomaly-induced effective action can reproduce the Hartle-Hawking stress-energy divergence at the Cauchy horizon of Reissner-Nordström, but lacks enough freedom to describe the Unruh state.

  4. Towards a Non-singular Paradigm of Black Hole Physics

    gr-qc 2025-01 unverdicted novelty 1.0 of 10

    This is a review built around a week-long workshop, synthesizing the state and open problems of regular black holes and black hole mimickers as alternatives to singular black holes.

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