1997/03/31 by Miguel S. Costa, Mirjam Cvetič, Mirjam Cvetic
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Black brane #Bound state #Brane #Brane cosmology #Cosmology and Gravitation Theories #Dual polyhedron #Entropy (arrow of time) #Extremal black hole #Geometry #Mathematical analysis #Mathematical physics #Mathematics #Noncommutative and Quantum Gravity Theories #Particle physics #Physics #Quantum mechanics #Supersymmetry #Upper and lower bounds #hep-th
paper · pdf · doi:10.1103/physrevd.56.4834
published as Phys.Rev.D56:4834-4843,1997 · RevTeX, 20 pages, minor corrections, version to appear in PRD
arxiv created 1997/07/14 · openalex publication_date 1997/10/15 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We start with Bogomol'nyi-Prasad-Sommerfield- (BPS) saturated configurations of two (orthogonally) intersecting M-branes and use the electromagnetic duality or dimensional reduction along a boost, in order to obtain new p-brane bound states. In the first case the resulting configurations are interpreted as BPS-saturated nonthreshold bound states of intersecting p-branes, and in the second case as p-branes intersecting at angles and their duals. As a by-product we deduce the enhancement of supersymmetry as the angle approaches zero. We also comment on the D-brane theory describing these new bound states, and a connection between the angle and the world-volume gauge fields of the D-brane system. We use these configurations to find new embeddings of the four- and five-dimensional black holes with nonzero entropy, whose entropy now also depends on the angle and world-volume gauge fields. The corresponding D-brane configuration sheds light on the microscopic entropy of such black holes.