Non-Critical Strings in Robertson-Walker Space Time

Details Non-Critical Strings in Robertson-Walker Space Time Non-Critical Strings in Robertson-Walker Space Time

1992-04-24

arxiv.org/abs/hep-th/9204078v2

Physics

High Energy Physics

High Energy Physics - Theory

9 pages

Scientific paper

I consider a D+1 dimensional nonlinear $\sigma$ model based on a possible interpretation of the Liouville field as a physical time. The Weyl invariance of this theory gives us restrictions for the background fields and the parameters of the theory, e.g.\ for trivial background one obtains the known regions for the dimension of the space-time ($\leq$1 or $\geq$25). For a Robertson-Walker space time a special solution of these equations is discussed.

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