Remarks on Tachyon Driven Cosmology

  title={Remarks on Tachyon Driven Cosmology},
  author={Ashoke Sen},
  journal={Physica Scripta},
  • A. Sen
  • Published 2005
  • Physics
  • Physica Scripta
We begin by reviewing the results on the decay of unstable D-branes in type II string theory, and the open–closed string duality proposal that arises from these studies. We then apply this proposal to the study of tachyon driven cosmology, namely cosmological solutions describing the decay of unstable space filling D-branes. This naturally gives rise to a time reversal invariant bounce solution with positive spatial curvature. In the absence of a bulk cosmological constant the universe always… 
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