Composite S-Brane Solutions On Product Of Ricci-Flat Spaces

TL;DR

This paper presents a family of generalized S-brane solutions on product spaces with Ricci-flat factors, highlighting subclasses with power-law and exponential expansion, relevant for cosmological models.

Contribution

It introduces new S-brane solutions with specific intersection rules and explores their properties, including accelerated expansion scenarios, in a multidimensional scalar and form field context.

Findings

Solutions include power-law and exponential scale factor behaviors.

Some solutions exhibit accelerated expansion of certain factor spaces.

Dependence of solutions on brane charges, dimensions, and couplings.

Abstract

A family of generalized $S$-brane solutions with orthogonal intersection rules and $n$ Ricci-flat factor spaces in the theory with several scalar fields and antisymmetric forms is considered. Two subclasses of solutions with power-law and exponential behaviour of scale factors are singled out. These subclasses contain sub-families of solutions with accelerated expansion of certain factor spaces. The solutions depend on charge densities of branes, their dimensions and intersections, dilatonic couplings and the number of dilatonic fields.