Closed Inhomogeneous String Cosmologies

Details Closed Inhomogeneous String Cosmologies Closed Inhomogeneous String Cosmologies

1997-04-24

arxiv.org/abs/hep-th/9704173v2

Phys. Rev. D56 (1997) 5166

Physics

High Energy Physics

High Energy Physics - Theory

14 pages, TeX harvmac. Some misprints corrected and one reference added

Scientific paper

10.1103/PhysRevD.56.5166

We present a general algorithm which permits to construct solutions in string cosmology for heterotic and type-IIB superstrings in four dimensions. Using a chain of transformations applied in sequence: conformal, T-duality and SL(2,R) rotations, along with the usual generating techniques associated to Geroch transformations in Einstein frame, we obtain solutions with all relevant low-energy remnants of the string theory. To exemplify our algorithm we present an inhomogeneous string cosmology with S^3 topology of spatial sections, discuss some properties of the solution and point out some subtleties involved in the concept of homogeneity and isotropy in string cosmology.

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