Quantum corrected black holes from string T-duality

Piero Nicolini, Euro Spallucci, Michael F. Wondrak

Research output: Contribution to journalArticlepeer-review


In this letter we present some stringy corrections to black hole spacetimes emerging from string T-duality. As a first step, we derive the static Newtonian potential by exploiting the relation between the T-duality and the path integral duality. We show that the intrinsic non-perturbative nature of stringy corrections introduces an ultraviolet cutoff known as zero-point length in the path integral duality literature. As a result, the static potential is found to be regular. We use this result to derive a consistent black hole metric for the spherically symmetric, electrically neutral case. It turns out that the new spacetime is regular and is formally equivalent to the Bardeen metric, apart from a different ultraviolet regulator. On the thermodynamics side, the Hawking temperature admits a maximum before a cooling down phase towards a thermodynamically stable end of the black hole evaporation process. The findings support the idea of universality of quantum black holes.

Original languageEnglish (US)
Article number134888
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
StatePublished - Oct 10 2019


  • Path integral duality
  • Quantum corrected black hole
  • String T-duality
  • Zero-point length

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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