Generating branes via sigma-models

Abstract

Starting with the D-dimensional Einstein-dilaton-antisymmetric form equations and assuming a block-diagonal form of a metric we derive a $(D-d)$-dimensional $\sigma$-model with the target space $SL(d,R)/SO(d)\times SL(2,R)/SO(2)\times R$ or its non-compact form. Various solution-generating techniques are developed and applied to construct some known and some new $p$-brane solutions. It is shown that the Harrison transformation belonging to the $SL(2,R)$ subgroup generates black $p$-branes from the seed Schwarzschild solution. A fluxbrane generalizing the Bonnor-Melvin-Gibbons-Maeda solution is constructed as well as a non-linear superposition of the fluxbrane and a spherical black hole. A new simple way to endow branes with additional internal structure such as plane waves is suggested. Applying the harmonic maps technique we generate new solutions with a non-trivial shell structure in the transverse space (`matrioshka' $p$-branes). It is shown that the $p$-brane intersection rules have a simple geometric interpretation as conditions ensuring the symmetric space property of the target space. Finally, a Bonnor-type symmetry is used to construct a new magnetic 6-brane with a dipole moment in the ten-dimensional IIA theory.

21 pages Latex

References in corpus (8)

• Intersection Rules for Non-Extreme $p$-Branes
• Intersection Rules for p-Branes
• Intersecting Branes
• Composite BPS configurations of p-branes in 10 and 11 dimensions
• Sigma-model for Generalized Composite p-branes
• Intersections involving waves and monopoles in eleven dimensions
• Non-extremal Intersecting p-branes in Various Dimensions
• Towards the Classification of Non-Marginal Bound States of M-branes and Their Construction Rules

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