de Sitter Spacetimes from Warped Compactifications of IIB String Theory

TL;DR

This paper presents a non-supersymmetric type IIB string theory solution with de Sitter spacetime, where non-trivial moduli induce a positive cosmological constant, resolving singularities in warped compactifications.

Contribution

It introduces a novel non-supersymmetric warped compactification solution with de Sitter space in type IIB string theory, linking moduli to cosmological constant generation.

Findings

Positive cosmological constant induced by stringy moduli.

Resolution of naked singularity via non-zero cosmological constant.

De Sitter spacetime realized in warped compactification context.

Abstract

We continue our study of codimension two solutions of warped space-time varying compactifications of string theory. In this letter we discuss a non-supersymmetric solution of the classical type IIB string theory with de Sitter gravity on a codimension two uncompactified part of spacetime. A non-zero positive value of the cosmological constant is induced by the presence of non-trivial stringy moduli, such as the axion-dilaton system for the type IIB string theory. Furthermore, the naked singularity of the codimension two solution is resolved by the presence of a small but non-zero cosmological constant.