Reconstructing cosmic acceleration from modified and non-minimal gravity: The Yang-Mills case - High Energy Physics - TheoryReport as inadecuate




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Abstract: A variant of the accelerating cosmology reconstruction program is developedfor $fR$ gravity and for a modified Yang-Mills-Maxwell theory. Reconstructionschemes in terms of e-foldings and by using an auxiliary scalar field aredeveloped and carefully compared, for the case of $fR$ gravity. An example ofa model with a transient phantom behavior without real matter is explicitlydiscussed in both schemes. Further, the two reconstruction schemes are appliedto the more physically interesting case of a Yang-Mills-Maxwell theory, againwith explicit examples. Detailed comparison of the two schemes ofreconstruction is presented also for this theory. It seems to support, as well,physical non-equivalence of the two frames.



Author: E. Elizalde, A. J. Lopez-Revelles

Source: https://arxiv.org/



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