Dark Energy and Modified gravity
Approximation of the potential in scalar field models
Francesco Pace
Richard Battye (JBCA, University of Manchester)
JBCA, University of Manchester
We study the nature of potentials in scalar field based models for dark energy - both with canonical and non-canonical kinetic terms. We calculate numerically, and using and analytic approximation around a=1, potentials for models with constant equation-of-state parameter, w. We find that for a wide range of models with canonical and non-canonical kinetic terms there is a simple approximation for the potential that holds when the scale factor is in the range [0.6,1.4] for the scale factor. We discuss how this form of the potential can be adapted to represent models with non-constant w and hence how it could be used in reconstruction from cosmological data.


13:30 - 15:00
BS - Lecture Theatre A25 (121)