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SS18 – Abstract
Javier Rubio
(ITP Heidelberg)
2.7.2018
Joint seminar with MPIK: Scale symmetry: an inflation–dark-energy connection
Inflation and dark energy share many essential properties. I will describe how these two eras can be easily unified into a common framework based on scale invariance. In particular, I will present a scale-invariant extension of the Standard Model non-minimally coupled to gravity containing just an additional degree of freedom on top of the Standard Model particle content. This model has some interesting features such as i) the existence of a conserved current that effectively forbids the generation of isocurvature perturbations ii) an alpha-attractor solution for the spectral tilt and the tensor-to-scalar ratio, iii) the absence of fifth-force effects and iv) a set measurable consistency relations between the inflationary observables and the dark-energy equation-of-state parameter that can be tested with future cosmological observations.
