205 citations · 1.8k across the 41 of their papers we have counts for
4 papers · 1 filter
Backreaction of linear perturbations and dark energy
Syksy Rasanen
A simple discussion on the backreaction of inhomogeneities in cosmology, focusing on the possibility that it could explain the present acceleration and solve the coincidence proble…
Backreaction in the Lemaitre-Tolman-Bondi model
Syksy Rasanen
We study backreaction analytically using the parabolic Lemaitre-Tolman-Bondi universe as a toy model. We calculate the average expansion rate and energy density on two different hy…
Correlated isocurvature perturbations from mixed inflaton-curvaton decay
Francesc Ferrer, Syksy Rasanen, Jussi Valiviita
We study cosmological perturbations in the case that present-day matter consists of a mixture of inflaton and curvaton decay products. We calculate how the curvaton perturbations a…
Photon production from non-equilibrium QGP in heavy ion collisions
F. Gelis, H. Niemi, P. V. Ruuskanen +1
We present a calculation of thermal photon production i.e. photons from secondary interactions among particles produced in heavy ion collisions at collider energies. This is done w…