Abstract

We derive a precise dictionary between micro-state geometries and open string condensates for a large class of excitations of four dimensional BPS black holes realised in terms of D3-branes intersecting on a six-torus. The complete multipole expansion of the supergravity solutions at weak coupling is extracted from string amplitudes involving one massless closed string and multiple open strings insertions on disks with mixed boundary conditions.

Highlights

  • The best understood example is the two-charge BPS system in type IIB theory for which the whole family of micro-state geometries is known [5,6,7]

  • In [8], the asymptotic form of the general micro-state geometries associated to a system of D1- and D5-branes has been derived from disk amplitudes computing the emission rate of closed string states from open string condensates at the D1-D5 intersections

  • The micro-state geometries will be derived from disk amplitudes computing the emission rate of massless closed string states from open string condensates binding the different stacks of D3 branes

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Summary

Supergravity solution

We consider four-dimensional BPS black hole solutions of type IIB supergravity consisting of D3-branes intersecting on T 6. ǪIJK characterise the triple intersections between two cycles on T 6 In terms of these functions the type IIB supergravity solution can be written as with ds2 = −e2U (dt + w)2 + e−2U dx2i +. Solutions with non-zero KI and M will be associated to condensates involving twisted open strings These excitations modify the geometry of the putative black hole in its interior while preserving the same asymptotic fall off at infinity. We remark that disks emissions add but massless closed string states interact with each other This entails non-linearity, so the resulting solution will not be the naive “superposition” of its constituents as it is obvious from (2.5). The Type IIB supergravity solution reduces to (discarding d-exact terms) ds2 = L−1/2 −dt2 + dyi2 + L1/2 This solution is generated by distributing D3-branes of type 0 in table 1 along R3. Similar solutions are found by turning on LI associated to the other three types of D3-branes in the table.

Harmonic expansions
String amplitudes and 1-charge microstates
L solutions at weak coupling
NS-NS amplitude
R-R amplitude Next we consider the R-R string amplitude
String amplitudes and 2-charge microstates
String amplitudes and 4-charge microstates
Conclusions and outlook
D0-D2-D4-D6 solution
D34-solution
Full Text
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