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Lambda-universe in scalar-tensor gravity
Authors:Marcelo Samuel Berman
Institution:(1) Instituto Albert Einstein/Latinamerica, Av. Candido Hartmann, 575 #17, 80730-440 Curitiba, PR, Brazil
Abstract:We present a lambda-Universe, in scalar-tensor gravity, reviewing Berman and Trevisan’s inflationary case (Berman and Trevisan in Int. J. Theor. Phys., 2009) and then we find a solution for an accelerating power-law scale-factor. The negativity of cosmic pressure implies acceleration of the expansion, even with Λ<0. The cosmological term, and the coupling “constant”, are in fact, time-varying.
Keywords:Lambda-term  Scalar-tensor  Power-laws  Scale-factors  Cosmology
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