1.5k citations · 22.2k across the 177 of their papers we have counts for
21 papers · 1 filter
Nonsingular Cosmology from an Interacting Vacuum
Marco Bruni, Rodrigo Maier, David Wands
We examine the dynamics of FLRW cosmologies in which the vacuum interacts with a perfect fluid through an energy exchange, focusing on the exploration of nonsingular configurations…
Stochastic collapse
Tays Miranda, Emmanuel Frion, David Wands
We investigate cosmological models described by a scalar field with an exponential potential, and apply the stochastic formalism, which allows us to study how quantum field fluctua…
Cosmological phase space analysis of the F (X) - V (phi) scalar field and bouncing solutions
Josue De-Santiago, Jorge L. Cervantes-Cota, David Wands
We analyze the dynamical system defined by a universe filled with a barotropic fluid plus a scalar field with modified kinetic term of the form L = F (X) - V (phi). After a suitabl…
Singularities in loop quantum cosmology
Thomas Cailleteau, Antonio Cardoso, Kevin Vandersloot +1
We show that simple scalar field models can give rise to curvature singularities in the effective Friedmann dynamics of Loop Quantum Cosmology (LQC). We find singular solutions for…
The cosmological gravitational wave background from primordial density perturbations
Kishore N. Ananda, Chris Clarkson, David Wands
We discuss the gravitational wave background generated by primordial density perturbations evolving during the radiation era. At second-order in a perturbative expansion, density f…
Brane-world cosmology
David Wands
Brane-world models, where observers are restricted to a brane in a higher-dimensional spacetime, offer a novel perspective on cosmology. I discuss some approaches to cosmology in e…