3 papers
astro-ph2003
Perturbations in cosmologies with a scalar field and a perfect fluid
Nicola Bartolo, Pier-Stefano Corasaniti, Andrew R. Liddle +1
We study the properties of cosmological density perturbations in a multi-component system consisting of a scalar field and a perfect fluid. We discuss the number of degrees of free…
astro-ph2003
From the production of primordial perturbations to the end of inflation
Michaël Malquarti, Samuel M. Leach, Andrew R. Liddle
In addition to generating the appropriate perturbation power spectrum, an inflationary scenario must take into account the need for inflation to end subsequently. In the context of…
astro-ph2003
K-essence and the coincidence problem
Michael Malquarti, Edmund J Copeland, Andrew R Liddle
K-essence has been proposed as a possible means of explaining the coincidence problem of the Universe beginning to accelerate only at the present epoch. We carry out a comprehensiv…