Journal of High Energy Physics

, 2015:195 | Cite as

Hair-brane ideas on the horizon

  • Emil J. MartinecEmail author
  • Ben E. Niehoff
Open Access
Regular Article - Theoretical Physics


We continue an examination of the microstate geometries program begun in arXiv:1409.6017, focussing on the role of branes that wrap the cycles which degenerate when a throat in the geometry deepens and a horizon forms. An associated quiver quantum mechanical model of minimally wrapped branes exhibits a non-negligible fraction of the gravitational entropy, which scales correctly as a function of the charges. The results suggest a picture of AdS3/CFT2 duality wherein the long string that accounts for BTZ black hole entropy in the CFT description, can also be seen to inhabit the horizon of BPS black holes on the gravity side.


Black Holes in String Theory Long strings Gauge-gravity correspondence 


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This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.


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Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  1. 1.Enrico Fermi Institute and Department of PhysicsUniversity of ChicagoChicagoU.S.A.
  2. 2.Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Centre for Mathematical SciencesCambridgeU.K.

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