GR and closeness to a black hole singularity

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SUMMARY

This discussion centers on the behavior of matter and energy near the event horizon of a Schwarzschild black hole, as described by general relativity (GR). It highlights the uncertainty regarding how close one can approach the singularity before quantum gravity theories become necessary. Various theories, including firewall, fuzzball, and energetic curtain, suggest significant implications of quantum gravity at the horizon. The author proposes a theory involving a quantum gravity core that expands as the black hole undergoes evaporation, detailed in their paper available at arXiv:1505.04088.

PREREQUISITES
  • Understanding of Schwarzschild black holes
  • Familiarity with general relativity (GR)
  • Basic knowledge of quantum gravity theories
  • Awareness of concepts like Hawking radiation
NEXT STEPS
  • Research the implications of quantum gravity on black hole singularities
  • Study the theories of firewall and fuzzball in detail
  • Examine the concept of Hawking radiation and its effects on black holes
  • Explore the proposed quantum gravity core theory in the context of black hole evaporation
USEFUL FOR

The discussion is beneficial for physicists, astrophysicists, and researchers interested in black hole physics, general relativity, and quantum gravity theories.

Randy Subers
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TL;DR
GR and closeness to a black hold singularity
Assume a Schwarzschild black hole. Near the event horizon other than Hawking radiation the behavior of matter and energy are fairly accuratly described by general relativity. How close can one get to the center (the singularity based on GR) before one must switch to a quantum gravity theory to provide accurate predictions?
 
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Nobody knows for sure. According to some theories (firewall, fuzzball, energetic curtain), quantum gravity has dramatic consequences already at the horizon. I have proposed a theory in which there is a quantum gravity core which grows as black hole shrinks due to evaporation: https://arxiv.org/abs/1505.04088
 
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