Contrasting the fuzzball and wormhole paradigms for black holes

  title={Contrasting the fuzzball and wormhole paradigms for black holes},
  author={Bin Guo and Marcel R. R. Hughes and Samir D. Mathur and Madhur Mehta},
We examine an interesting set of recent proposals describing a ‘wormhole paradigm’ for black holes. These proposals require that in some effective variables, semiclassical low-energy dynamics emerges at the horizon. We prove the ‘effective small corrections theorem’ to show that such an effective horizon behavior is not compatible with the requirement that the black hole radiate like a piece of coal as seen from outside. This theorem thus concretizes the fact that the proposals within the… 
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