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Multi-dimensional cosmological models in effective string gravitation. I

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Abstract

We consider multi-dimensional cosmological models in the low-energy field theory of strings with a boson gravitational sector containing a metric, dilaton field, and antisymmetric Kalb-Ramon field. We study the conformal properties of the action and show that in the general conformal representation the theory is equivalent to a generalized scalar-tensor theory with a Lagrangian of nongravitating matter dependent on the dilaton. We find exact solutions of the flat homogeneous anisotropic model with structure R×M1×...×Mn and with equation of state pi=aiε in the space Mi. We discuss the picture of cosmological evolution in different conformal representations.

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Authors
  1. A. A. Saaryan
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Translated fromAstrofizika, Vol. 38, No. 2, 1995.

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Saaryan, A.A. Multi-dimensional cosmological models in effective string gravitation. I. Astrophysics 38, 164–175 (1995). https://doi.org/10.1007/BF02048592

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  • DOI: https://doi.org/10.1007/BF02048592

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