3 papers
gr-qc2025
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-rol…
gr-qc2025
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…
gr-qc2025
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…