Predicted Dark Energy Constraints using 3D Weak Lensing

I hereby present two different methods that will allow weak lensing shape measurements of galaxies combined with redshift information – 3D weak lensing – to constrain the dark energy equation of state. The two methods are the geometric ratio test (Taylor et al. 2007) and a shear harmonic test (Heavens et al. 2006). The results presented here use a Fisher matrix approach for each method to place lower limits on the expected cosmological parameter constraints from future weak lensing surveys combined with a predicted Planck CMB prior, fully marginalizing over all cosmological parameters and allowing for spatial curvature. The parameter estimation technique allows for an optimisation of future experiments so that the dark energy parameter constraints, given a specific amount of time on a particular instrument, can be minimised.