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arXiv · 2504.05492

The lifetime of white hole remnants is $M^5$

Pierre Martin-Dussaud
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Abstract

The black-to-white hole scenario is a well-motivated proposal from non-perturbative quantum gravity concerning the final stage of black hole evaporation. In this framework, a black hole of initial mass $M$ undergoes Hawking evaporation over a timescale of order $M^3$ before tunneling into a long-lived white hole. Previous estimates suggest that the lifetime of the resulting white hole scales as $M^4$. In this short note, I argue that such estimates neglect key aspects of the white hole's internal dynamics, and I demonstrate that a more consistent timescale for the white hole lifetime is of order $M^5$.

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Pierre Martin-Dussaud. 2025-04-07. The lifetime of white hole remnants is $M^5$. https://arxiv.org/abs/2504.05492

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