# Non-Critical Strings in Robertson-Walker Space Time

Source: [Non-Critical Strings in Robertson-Walker Space Time](<https://www.sota2.com/research/paper/68fa21597a2b558e29336a95>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T00:56:50.514Z

Authors: K. Behrndt

Published: 1992-04-24T11:41:10.000Z

## Abstract

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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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/hep-th/9204078>)

[PDF](<https://arxiv.org/pdf/hep-th/9204078.pdf>)