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Singularity at the demise of a black hole

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arxiv 2310.17266 v2 pith:O7DH3RTZ submitted 2023-10-26 gr-qc

Justin C. Feng , Shinji Mukohyama , Sante Carloni This is my paper · ORCID
classification gr-qc
keywords singularitiesblackclassconesholelightspacetimeappear
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abstract

We consider a class of quasiregular singularities characterized by points possessing two future-directed light cones and two past-directed light cones. Such singularities appear in the $1+1$ trousers spacetime and the Deutsch-Politzer spacetime. We argue that these singularities are relevant for describing the end point of an evaporating black hole, and show that a class of emergent Lorentz signature theories can provide a microscopic description for these singularities.

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  1. Emergent Lorentzian dispersion relations from a Euclidean scalar-tensor theory

    gr-qc 2025-04 conditional novelty 5.0 of 10

    For a chosen parameter range, a massless tensor perturbation of a Euclidean scalar-tensor theory obeys a Lorentzian dispersion relation, while extra scalar/vector modes remain Euclidean or ghost-like and require bound...

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