192 citations · 2.3k across the 49 of their papers we have counts for
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Coupled dark energy and dark matter from dilatation anomaly
Joschka Beyer, Sami Nurmi, Christof Wetterich
Cosmological runaway solutions may exhibit an exact dilatation symmetry in the asymptotic limit of infinite time. In this limit, the massless dilaton or cosmon could be accompanied…
Scale-dependent non-Gaussianity probes inflationary physics
Christian T. Byrnes, Mischa Gerstenlauer, Sami Nurmi +2
We calculate the scale dependence of the bispectrum and trispectrum in (quasi) local models of non-Gaussian primordial density perturbations, and characterize this scale dependence…
Inflationary Infrared Divergences: Geometry of the Reheating Surface vs. delta N Formalism
Christian T. Byrnes, Mischa Gerstenlauer, Arthur Hebecker +2
We describe a simple way of incorporating fluctuations of the Hubble scale during the horizon exit of scalar perturbations into the delta N formalism. The dominant effect comes fro…