Point Particle Motion in DFT and a Singularity-Free Cosmological Solution

Understand

We generalize the action for point particle motion to a double field theory background.

• After deriving the general equations of motion for these particle geodesics, we specialize to the case of a cosmological background with vanishing antisymmetric tensor field and constant dilaton.
• We then show that the geodesics can be extended to infinity in both time directions once we define the appropriate physical clock.
• Following this prescription, we also show the existence of a singularity-free cosmological solution.