Dynamical D4-D8 and D3-D7 branes in supergravity

P. Binétruy 1 M. Sasaki K. Uzawa
APC - UMR 7164 - AstroParticule et Cosmologie, Institut für theoretische Physik
Abstract : We present a class of dynamical solutions for intersecting D4-D8 and D3-D7 brane systems in ten-dimensional type IIA and IIB supergravity. We discuss if these solutions can be recovered in lower-dimensional effective theories for the warped compactification of a general p-brane system. It is found that an effective p+1-dimensional description is not possible in general due to the entanglement of the transverse coordinates and the p+1-dimensional coordinates in the metric components. For the D4-D8 brane system, the dynamical solutions reduces to a static warped AdS6×S4 geometry in a certain spacetime region. For the D3-D7 brane system, we find a dynamical solution whose metric form is similar to that of a D3-brane solution. The main difference is the existence of a nontrivial dilaton configuration in the D3-D7 solution. Then we discuss cosmology of these solutions. We find that they behave like a Kasner-type cosmological solution at τ→∞, while it reduces to a warped static solution at τ→0, where τ is the cosmic time.
Type de document :
Article dans une revue
Physical Review D, American Physical Society, 2009, 80, pp.026001. 〈10.1103/PhysRevD.80.026001〉
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Soumis le : vendredi 4 janvier 2008 - 13:48:59
Dernière modification le : mercredi 31 janvier 2018 - 12:12:23

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P. Binétruy, M. Sasaki, K. Uzawa. Dynamical D4-D8 and D3-D7 branes in supergravity. Physical Review D, American Physical Society, 2009, 80, pp.026001. 〈10.1103/PhysRevD.80.026001〉. 〈in2p3-00202152〉



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