The black hole interior and a curious sum rule

Amit Giveon, Nissan Itzhaki, Jan Troost

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


We analyze the Euclidean geometry near non-extremal NS5-branes in string theory, including regions beyond the horizon and beyond the singularity of the black brane. The various regions have an exact description in string theory, in terms of cigar, trumpet and negative level minimal model conformal field theories. We study the worldsheet elliptic genera of these three superconformal theories, and show that their sum vanishes. We speculate on the significance of this curious sum rule for black hole physics.

Original languageEnglish
Article number63
JournalJournal of High Energy Physics
Issue number3
StatePublished - Mar 2014


  • Black Holes in String Theory
  • Conformal Field Models in String Theory


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