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arXiv · 1006.1936

Are stealth scalar fields stable?

Valerio Faraoni·Andres F. Zambrano Moreno
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Abstract

Non-gravitating (stealth) scalar fields associated with Minkowski space in scalar-tensor gravity are examined. Analytical solutions for both non-minimally coupled scalar field theory and for Brans-Dicke gravity are studied and their stability with respect to tensor perturbations is assessed using a covariant and gauge-invariant formalism developed for alternative gravity. For Brans-Dicke solutions, the stability with respect to homogeneous perturbations is also studied. There are regions of parameter space corresponding to stability and other regions corresponding to instability.

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Valerio Faraoni, Andres F. Zambrano Moreno. 2010-06-10. Are stealth scalar fields stable?. https://doi.org/10.1103/physrevd.81.124050

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