123 citations · 510 across the 9 of their papers we have counts for
8 papers · 1 filter
The Status of Single Scalar Field Dark Energy
Carlos García-García, Pedro G. Ferreira, William J. Wolf
We present an assessment of the current observational status of single scalar field models of dark energy. Motivated by recent cosmological measurements -- including baryon acousti…
Cosmological constraints on Galileon dark energy with broken shift symmetry
William J. Wolf, Pedro G. Ferreira, Carlos García-García
Current cosmological data seem to show that dark energy is evolving in time and that it possibly crossed the phantom divide in the past. So far the only theories that lead to such…
Assessing cosmological evidence for non-minimal coupling
William J. Wolf, Carlos García-García, Theodore Anton +1
The recent observational evidence of deviations from the -Cold Dark Matter (CDM) model points towards the presence of evolving dark energy. The simplest possibility consists…
Robustness of dark energy phenomenology across different parameterizations
William J. Wolf, Carlos García-García, Pedro G. Ferreira
The recent evidence for dynamical dark energy from DESI, in combination with other cosmological data, has generated significant interest in understanding the nature of dark energy…
Matching current observational constraints with nonminimally coupled dark energy
William J. Wolf, Pedro G. Ferreira, Carlos García-García
We show that a Universe with a nonminimally coupled scalar field can fit current measurements of the expansion rate of the Universe better than the standard -Cold Dark Matter ($…
Scant evidence for thawing quintessence
William J. Wolf, Carlos García-García, Deaglan J. Bartlett +1
New constraints on the expansion rate of the Universe seem to favor evolving dark energy in the form of thawing quintessence models, i.e., models for which a canonical, minimally c…
Minimizing the tensor-to-scalar ratio in single-field inflation models
William J. Wolf
We revisit a class of simple single-field inflation models and demonstrate that they can readily produce a negligible tensor/scalar ratio . Motivated by recent work suggesting t…
Underdetermination of dark energy
William J. Wolf, Pedro G. Ferreira
There is compelling evidence that the Universe is undergoing a late phase of accelerated expansion. One of the simplest explanations for this behaviour is the presence of dark ener…