Nonlocal String Tachyon as a Model for Cosmological Dark Energy

  title={Nonlocal String Tachyon as a Model for Cosmological Dark Energy},
  author={I. Ya. Aref’eva and Steklov},
  • I. Ya. Aref’eva, Steklov
  • Published 2008
There are many different phenomenological models describing the cosmological dark energy and accelerating Universe by choosing adjustable functions. In this paper we consider a specific model of scalar tachyon field which is derived from the NSR string field theory and study its cosmological applications. We find that in the effective field theory approximation the equation of state parameter w < −1, i.e. one has a phantom Universe. It is shown that due to nonlocal effects there is no quantum… CONTINUE READING
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