Dilatonic Effect in Double Field Theory Cosmology

TL;DR

This paper explores how the dilaton influences cosmological solutions within double field theory, analyzing different frames and potential dark energy candidates to understand their roles in early universe dynamics.

Contribution

It provides new solutions for double field theory cosmology with a shifted dilaton and examines conditions for dark energy candidates within this framework.

Findings

Solutions in supergravity and winding frames

Conditions for dark energy candidates

Effects of a generalized dilaton potential

Abstract

In this article we discuss some aspects of double field theory cosmology with an emphasis on the role played by the dilaton. The cosmological solutions of double field theory equations of motion after coupling a shifted dilaton to them are investigated. The equations of motion for a constant shifted dilaton and a constant usaul dilaton in an FRW universe are obtained. The solutions of these equations are obtained in both the supergravity frame and in the winding frame. We also consider three possible dark energy candidates in a 4D universe using double field theory cosmology and find some basic conditions which the three dark energy candidates should satisfy. We consider the results for a more general potential of shifted dilaton as well.