T-dual cosmological solutions in double field theory
  We investigate the cosmological solutions coming from the double field theory
equations of motion after coupling a matter source to them. Assuming constant
dilaton and imposing the section condition with respect to the regular
coordinates leads to a universe dominated by momentum modes while imposing the
section condition with respect to the dual coordinates naturally leads to a
universe dominated by momentum modes. We show that both regimes have asymptotic
behaviours related by T-duality. This hints towards defining a duality between
the clocks considered in each regime and interpreting winding modes as being
radiation from the point of view of a Euclidean time.
