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Scalar-tensor $σ$-cosmologies

Spiros Cotsakis·John Miritzis
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Abstract

We show that the scalar-tensor $σ$-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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Spiros Cotsakis, John Miritzis. 2001-01-02. Scalar-tensor $σ$-cosmologies. https://arxiv.org/abs/gr-qc/0011086

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