Frederik Denef, Mboyo Esole, Megha Padi

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


By T-dualizing space-filling D-branes in 4d IIB orientifold Compactifications along the three non-internal spatial directions, we obtain black hole bound states living in a universe with a gauged spatial reection symmetry. We call these objects orientiholes. The gravitational entropy of various IIA orientihole configurations provides an \experimental" estimate of the number of vacua in various sectors of the IIB landscape. Furthermore, basic physical properties of orientiholes map to (sometimes subtle) microscopic features, thus providing a useful alternative viewpoint on a number of issues arising in D-brane model building. More generally, we give orientihole generalizations of recently derived wall crossing formulae, and conjecture a relation to the topological string analogous to the OSV conjecture, but with a linear rather than a quadratic identification of partition functions.

Original languageEnglish (US)
Article number45
JournalJournal of High Energy Physics
Issue number3
StatePublished - 2010
Externally publishedYes


  • Black holes in string theory
  • Superstring vacua

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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