In this paper we construct the BPS black hole generating solution of toroidally compactified string land M) theory, giving for it both the macroscopic and microscopic description. Choosing a proper U-duality gauge the latter will be given by a bound state made solely of D-branes. The axionic nature of the supergravity solution will be directly related to non-trivial angles between the constituent D-branes (type IIB configuration) or, in a T-dual gauge, to the presence of magnetic Aux on constituent D-brane worldvolumes (type IIA configuration). As expected, the four-dimensional axion fields arise from the dimensional reduction of non-diagonal metric tensor components or Kalb-Ramond B field components for type IIB or type ITA cases, respectively. Thanks to this result it is then now possible to fill the Still 56-dimensional U-duality orbit of N = 8 BPS black holes and to have a macroscopic and microscopic description of all of them.
Regular BPS black holes: macroscopic and microscopic description of the generating solution / Bertolini, M.; Trigiante, M.. - In: NUCLEAR PHYSICS. B. - ISSN 0550-3213. - 582:1-3(2000), pp. 393-406. [10.1016/S0550-3213(00)00216-9]
Regular BPS black holes: macroscopic and microscopic description of the generating solution
Bertolini, M.;
2000-01-01
Abstract
In this paper we construct the BPS black hole generating solution of toroidally compactified string land M) theory, giving for it both the macroscopic and microscopic description. Choosing a proper U-duality gauge the latter will be given by a bound state made solely of D-branes. The axionic nature of the supergravity solution will be directly related to non-trivial angles between the constituent D-branes (type IIB configuration) or, in a T-dual gauge, to the presence of magnetic Aux on constituent D-brane worldvolumes (type IIA configuration). As expected, the four-dimensional axion fields arise from the dimensional reduction of non-diagonal metric tensor components or Kalb-Ramond B field components for type IIB or type ITA cases, respectively. Thanks to this result it is then now possible to fill the Still 56-dimensional U-duality orbit of N = 8 BPS black holes and to have a macroscopic and microscopic description of all of them.File | Dimensione | Formato | |
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