The cosmology of a fundamental scalar

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Abstract

We observe that the standard homogeneous cosmologies, those of Minkowski, de Sitter, and anti-de Sitter, which form the matrix for the Robertson–Walker scale factor, live naturally as isolated points inside a larger family of conformally flat metrics obtained by allowing a tensor containing the information of conformal symmetry breaking to be more general. So the standard cosmological metrics are parametrically unstable in this sense, and therefore unphysical. When we pass to the stable family of perturbed metrics, we immediately encounter a scalar field, which drives the conformal expansion of the universe and which automatically obeys the non-linear sine-Gordon equation. The Lagrangian for the sine-Gordon equation is a cosine potential agreeing to the fourth order with the potential used in the approach to the generation of mass in gauge theories. Accordingly we identify our geometric scalar field—actually of the type of an abelian gauge field—with the recently discovered scalar field. There are two constants in the theory: the first, named \(m\), is positive and defines a mass scale for the universe; the second, named \(\varLambda \), is the cosmological constant. For the space–time to be everywhere non-singular, equivalently for the (strict) dominant energy condition to hold, these constants must obey the inequality \(\varLambda > m^2/4\).

Keywords

Cosmology Twistor theory Broken symmetry Higgs field 
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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Department of MathematicsUniversity of PittsburghPittsburghUSA

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