Shock waves from black holes
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Date
2023-02
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University of New Brunswick
Abstract
Black holes are among the most interesting objects in the universe. While in the classical description of gravity (general relativity) these objects contain singular points in which the theory breaks down, it is expected that these problematic points are avoided in a quantum theory of gravity. In this thesis, I present two different models based on an effective description of loop quantum gravity: a vacuum description of black holes and an extension for matter collapse. The study of the vacuum model is presented in Chapter 2 and the matter collapse is described in Chapters 3, as a first point of contact, and 4, which contains a more detailed analysis in both analytic and numerical calculations. The features and predictions that these models offer are several: i) provide a comprehensive evolution of dust matter collapse; ii) present a bounce after the contracting phase of matter; iii) predict the disappearance of the black hole and the emission of a shockwave; iv) determine the lifetime of the black hole to be proportional to its mass squared.