Scale-invariant alternatives to general relativity. III. The inflation-dark energy connection
Scale-invariant alternatives to general relativity. III. The inflation-dark energy connection
We discuss the cosmological phenomenology of biscalar-tensor models displaying a maximally symmetric Einstein-frame kinetic sector and constructed on the basis of scale symmetry and volume-preserving diffeomorphisms. These theories contain a single dimensionful parameter ${\mathrm{\ensuremath{\Lambda}}}_{0}$---associated with the invariance under the aforementioned restricted coordinate transformations---and a massless dilaton field. At large field …