Multi-dimensional cosmological models in effective string gravitation. I

Details Multi-dimensional cosmological models in effective string gravitation. I Multi-dimensional cosmological models in effective string gravitation. I

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ap.....38..164s&link_type=abstract

Astrophysics, Volume 38, Issue 2, pp.164-175

Astronomy and Astrophysics

Astrophysics

3

Scientific paper

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=aiɛ in the space Mi. We discuss the picture of cosmological evolution in different conformal representations.

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