Flat-brane Compactifications in Supergravity Induced by Scalars

TL;DR

This paper explores flat compactifications of supergravity theories via scalar fields, constructing finite energy solutions with branes that maintain a flat brane universe without a cosmological constant.

Contribution

It introduces new flat-brane compactification solutions in supergravity theories with scalar-induced compactifications and branes, including explicit intersecting brane configurations.

Findings

Constructed finite energy solutions with branes in supergravity

Achieved flat brane geometries without cosmological constant

Extended solutions to various supergravity dimensions and scalar manifolds

Abstract

We discuss flat compactifications of supergravities in diverse dimensions in the presence of branes. The compactification is induced by the scalar fields of supergravity and it is such that there is no relic cosmological constant on the brane, rendering this way the latter flat. We discuss in particular the D=4, $N=2,4$ and D=8, N=1 supergravities with $n=1,2,3$ vector multiplets where the scalar manifolds are Grassmannian cosets of the form $SO(2,n)/SO(2)\times SO(n)$. By introducing branes at certain points in the transverse space, finite energy solutions to the field equations are constructed. Some of the solutions we present may be interpreted as intersecting branes.