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The Internal Geometry of an Evaporating Black Hole

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arxiv hep-th/9405007 v2 pith:M22FYGYT submitted 1994-05-02 hep-th gr-qc

classification hep-thgr-qc
keywords evaporationblackthroatuniverseeitherexteriorgeometryhole
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abstract

We present a semi-classical model for the formation and evaporation of a four dimensional black hole. We solve the equations numerically and obtain solutions describing the entire the space-time geometry from the collapse to the end of the evaporation. The solutions satisfy the evaporation law: $\dot M \propto -M^{-2}$ which confirms dynamically that black holes do evaporate thermally. We find that the evaporation process is in fact the shrinking of a throat that connects a macroscopic interior ``universe" to the asymptotically flat exterior. It ends either by pinching off the throat leaving a closed universe and a Minkowskian exterior or by freezing up when the throat's radius approaches a Planck size. In either case the macroscopic inner universe is the region where the information lost during the evaporation process is hidden.

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Forward citations

Cited by 8 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. Macroscopic Black-Hole Remnants in a Nonlocal Field Theory: Towards Hawking Radiation in SFT

    hep-th 2026-06 unverdicted novelty 6.0 of 10

    In a smeared massless scalar on dynamical black hole, outgoing particle number drops to zero after scrambling time due to SFT nonlocality, implying macroscopic remnant.

  4. Macroscopic backreaction of the trace anomaly on classical vacuum backgrounds

    gr-qc 2025-12 conditional novelty 6.0 of 10

    Order-reduced backreaction of the trace-anomaly RSET on Schwarzschild gives a naked singularity without compensatory terms and a wormhole throat with them.

  5. Dynamical evolution and stability of quantum corrected Schwarzschild black holes in semiclassical gravity

    gr-qc 2025-06 conditional novelty 6.0 of 10

    The static quantum corrected Schwarzschild wormhole is dynamically unstable: it expands in vacuum and collapses into an evaporating black hole when a small amount of matter is present.

  6. Quantum corrected Einstein-Yang-Mills black holes in semiclassical gravity

    gr-qc 2025-02 conditional novelty 6.0 of 10

    Quantum vacuum backreaction in the Polyakov approximation removes the classical horizon from Einstein-Yang-Mills black holes, replacing it with a wormhole for large horizons and a compact horizonless object for small ones.

  7. Page Time of Primordial Black Holes in the Standard Model and Beyond

    astro-ph.CO 2025-02 conditional novelty 6.0 of 10

    For Standard Model emission, a Schwarzschild primordial black hole of about 6.23 x 10^14 grams would reach its Page time at the current age of the Universe.

  8. UV Effects and Short-Lived Hawking Radiation: Alternative Resolution of Information Paradox

    hep-th 2024-11 unverdicted novelty 5.0 of 10

    Hawking radiation terminates around the scrambling time due to trans-Planckian stringy effects in GUP and string-field-theory-inspired toy models, yielding negligible evaporation and a mostly classical black hole.

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