Vol 12, No 1 (2012) / Singh

String cosmological models in the Brans-Dicke theory for five-dimensional space-time

Koijam Manihar Singh, Kangujam Priyokumar Singh

Abstract

Five-dimensional space-time string cosmological models generated by a cloud of strings with particles attached to them are studied in the Brans-Dicke theory. We obtain two types of interesting models by taking up the cases of geometric strings (or Nambu strings) and p-strings (Takabayasi strings), and study their different physical and dynamical properties. The roles of the scalar field in getting different phases, such as the inflationary phase and the string-dominated phase, are discussed. An interesting feature obtained here is that in one of the models there is a “bounce” at a particular instant of its evolution.

Keywords


cosmology: theory — string universes — Brans-Dicke theory

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