145 citations · 2.2k across the 67 of their papers we have counts for
68 papers
Quintessence: Quadratic potentials
Artur Alho, Claes Uggla
Arguably one can use a canonical scalar field , minimally coupled to gravity, with quadratic potentials to explore some general features of slow-roll a…
Oscillatory spacelike singularities: The Bianchi type vacuum models
Phillipo Lappicy, Claes Uggla
The Bianchi type , and vacuum models all have 4-dimensional Hubble-normalized state spaces and are expected to have a generic init…
New simple and accurate quintessence approximations
Artur Alho, Claes Uggla
We derive new approximations for quintessence solutions that are simpler and an order of magnitude more accurate than anything available in the literature, which from an observatio…
Tracking Quintessence
Artur Alho, Claes Uggla, John Wainwright
Tracking quintessence, in a spatially flat and isotropic space-time with a minimally coupled canonical scalar field and an asymptotically inverse power-law potential $V(φ)\proptoφ^…
Quintessential -attractor inflation: A dynamical systems analysis
Artur Alho, Claes Uggla
The equations for quintessential -attractor inflation with a single scalar field, radiation and matter in a spatially flat FLRW spacetime are recast into a regular dynamical sys…
Quintessence from a state space perspective
Artur Alho, Claes Uggla, John Wainwright
We use dynamical systems methods to study quintessence models in a spatially flat and isotropic spacetime with matter and a scalar field with potentials for which …