Scalar-tensor σ-cosmologies
classification
🌀 gr-qc
keywords
scalar-tensorsigmawavemapactionarbitraryconformallycosmologiescoupled
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We show that the scalar-tensor $\sigma$-model action is conformally equivalent to general relativity with a minimally coupled wavemap with a particular target metric. Inflation on the source manifold is then shown to occur in a natural way due both to the arbitrary curvature couplings and the wavemap self-interactions.
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