Dilatonic Effect in Double Field Theory Cosmology

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.

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• Double Field Theory
• The gauge algebra of double field theory and Courant brackets
• Holographic tachyon model of dark energy
• Holographic Dark Energy in Brans-Dicke Theory
• Non-singular string cosmology via ${\alpha }^{\prime }$ corrections
• T-Dual Cosmological Solutions of Double Field Theory II
• Loop Corrections in Double Field Theory: Non-trivial Dilaton Potentials