Cosmological Implications from O(D,D)

TL;DR

This paper explores the cosmological implications of double field theory by analyzing specific symmetric metrics, providing insights into T-duality's role in cosmology.

Contribution

It introduces solutions for FRW and spherically symmetric metrics within DFT, advancing understanding of cosmological models under T-duality.

Findings

Solutions for FRW metrics in DFT

Properties of doubled spherically symmetric metrics

Insights into T-duality in cosmological contexts

Abstract

Double field theory (DFT) offers a manifest T-duality formulation for massless closed string field theory with both momentum and winding excitation. The gauge symmetry is defined by the generalized Lie derivative which is the extension of the Courant bracket. In this work, we solve and study the properties of FRW (Friedmann- Robertson-Walker) and doubled spherically symmetric metric of DFT.