Cosmological Implications from O(D,D)

Understand

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.