AN EXACT COSMOLOGICAL SOLUTION TO STRING THEORY

Oscar Jofre; Carmen Núñez

AN EXACT COSMOLOGICAL SOLUTION TO STRING THEORY

高能物理 - 理论 2008-02-03 v2

作者: Oscar Jofre , Carmen Núñez

摘要

A homogeneous anisotropic four dimensional spacetime with Lorentzian signature is constructed from an ungauged WZW model based on a non-semisimple Lie group. The associated non-linear $\sigma$ -model describes string propagation in an expanding-contracting universe with antisymmetric tensor and dilaton backgrounds. The current algebra of SL(2,R) $\times$ R is constructed in terms of two free boson fields and two generalized parafermions, or four free bosons with background charge. This representation is used to study the string spectrum in the cosmological background.

关键词

string theory wess-zumino-witten models

引用

@article{arxiv.hep-th/9502150,
  title  = {AN EXACT COSMOLOGICAL SOLUTION TO STRING THEORY},
  author = {Oscar Jofre and Carmen Núñez},
  journal= {arXiv preprint arXiv:hep-th/9502150},
  year   = {2008}
}

备注

Marginal errors corrected. The sign of the level k of the Kac-Moody algebra was changed to explicitly take into account the non-compactness of the group. Some references have been added

AN EXACT COSMOLOGICAL SOLUTION TO STRING THEORY

摘要

关键词

引用

备注

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