ar X iv : g r - qc / 0 10 71 00 v 1 3 1 Ju l 2 00 1 A note on wavemap - tensor cosmologies ∗
نویسندگان
چکیده
We examine theories of gravity which include finitely many coupled scalar fields with arbitrary couplings to the curvature (wavemaps). We show that the most general 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 novel way due to the combined effect of arbitrary curvature couplings and wavemap self-interactions. A new interpretation of the conformal equivalence theorem proved for such ‘wavemap-tensor’ theories through brane-bulk dynamics is also discussed.
منابع مشابه
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where Lσ = A(φ)R − 1 2 B(φ)Trg(φ h) = A(φ)R − 1 2 B(φ)ghab∂μφ ∂νφ , (2) where A,B are arbitrary C∞ functions of φ. We see that S has arbitrary couplings to the curvature and kinetic terms and we call it the scalar-tensor σ-model or, the scalar-tensor wavemap action. Such a theory includes as special cases many of the scalar field models considered in the literature (e.g.,). Under compact variat...
متن کاملar X iv : g r - qc / 0 01 10 86 v 2 2 J an 2 00 1 SCALAR - TENSOR σ - COSMOLOGIES
Lσ = A(φ)R −B(φ)Trg(φh) = A(φ)R −B(φ)ghab∂μφ∂νφ, (2) where A,B are arbitrary C∞ functions of φ. We see that S has arbitrary couplings to the curvature and kinetic terms and we call it the scalar-tensor σ-model or, the scalar-tensor wavemap action. Such a theory includes as special cases many of the scalar field models considered in the literature (e.g.,). Under compact variations of the familie...
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