Oscillations in the inflaton potential? (2009)
Pahud, Cédric, Kamionkowski, Marc, Liddle, Andrew R.
We consider a class of inflationary models with small oscillations imprinted on an otherwise smooth inflaton potential. These oscillations are manifest as oscillations in the power spectrum of...
Oscillations in the inflaton potential? (2008)
Pahud, Cédric, Kamionkowski, Marc, Liddle, Andrew R
We consider a class of inflationary models with small oscillations imprinted on an otherwise smooth inflaton potential. These oscillations are manifest as oscillations in the power spectrum of...
Triple unification of inflation, dark matter, and dark energy using a single field (2008)
Liddle, Andrew R., Pahud, Cédric, Ureña-López, L. Arturo
We construct an explicit scenario whereby the same material driving inflation in the early Universe can comprise dark matter in the present Universe, using a simple quadratic potential. Following...
When can the Planck satellite measure spectral index running? (2007)
Pahud, Cédric, Liddle, Andrew R., Mukherjee, Pia, Parkinson, David
We use model selection forecasting to assess the ability of the Planck satellite to make a positive detection of spectral index running. We simulate Planck data for a range of assumed cosmological...
Intermediate inflation in light of the three-year WMAP observations (2006)
Barrow, John D, Liddle, Andrew R, Pahud, Cédric
The three-year observations from the Wilkinson Microwave Anisotropy Probe have been hailed as giving the first clear indication of a spectral index n_s0 is given (within the slow-roll approximation)...
Model selection forecasts for the spectral index from the Planck satellite (2006)
Pahud, Cédric, Liddle, Andrew R, Mukherjee, Pia, Parkinson, David
The recent WMAP3 results have placed measurements of the spectral index n_S in an interesting position. While parameter estimation techniques indicate that the Harrison-Zel'dovich spectrum n_S=1 is...