Inflation in string-inspired cosmology and suppression of CMB low multipoles

  title={Inflation in string-inspired cosmology and suppression of CMB low multipoles},
  author={Yunsong Piao and Shinji Tsujikawa and Xinmin Zhang},
  journal={Classical and Quantum Gravity},
We construct a string-inspired nonsingular cosmological scenario in which an inflaton field is driven up the potential before the graceful exit by employing a low-energy string effective action with an orbifold compactification. This sets up an initial condition for the inflaton to lead to a sufficient number of e-foldings and to generate a nearly scale-invariant primordial density perturbation during slow-roll inflation. Our scenario provides an interesting possibility to explain a suppressed… 
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