Geometry of D1-D5-P bound states

Details Geometry of D1-D5-P bound states Geometry of D1-D5-P bound states

2004-09-06

arxiv.org/abs/hep-th/0409067v2

Nucl.Phys. B729 (2005) 203-220

Physics

High Energy Physics

High Energy Physics - Theory

20 pages, LaTeX; references added

Scientific paper

10.1016/j.nuclphysb.2005.09.037

Supersymmetric solutions of 6-d supergravity (with two translation symmetries) can be written as a hyperkahler base times a 2-D fiber. The subset of these solutions which correspond to true bound states of D1-D5-P charges give microstates of the 3-charge extremal black hole. To understand the characteristics shared by the bound states we decompose known bound state geometries into base-fiber form. The axial symmetry of the solutions make the base Gibbons-Hawking. We find the base to be actually `pseudo-hyperkahler': The signature changes from (4,0) to (0,4) across a hypersurface. 2-charge D1-D5 geometries are characterized by a `central curve' $S^1$; the analogue for 3-charge appears to be a hypersurface that for our metrics is an orbifold of $S^1\times S^3$.

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