352 citations · 819 across the 15 of their papers we have counts for
15 papers
Gravitational waves from the fragmentation of a supersymmetric condensate
Alexander Kusenko, Anupam Mazumdar, Tuomas Multamaki
We discuss the production of gravity waves from the fragmentation of a supersymmetric condensate in the early universe. Supersymmetry predicts the existence of flat directions in t…
Fitting oscillating string gas cosmology to supernova data
Francesc Ferrer, Tuomas Multamaki, Syksy Rasanen
In string gas cosmology, extra dimensions are stabilised by a gas of strings. In the matter-dominated era, competition between matter pushing the extra dimensions to expand and the…
Non-Gaussianity in three fluid curvaton model
Tuomas Multamaki, Jani Sainio, Iiro Vilja
The generation of non-gaussianity is studied in a three fluid curvaton model. By utilizing second order perturbation theory we derive general formulae for the large scale temperatu…
Large tensor-to-scalar ratio and low scale inflation
Rouzbeh Allahverdi, Anupam Mazumdar, Tuomas Multamaki
It is plausible that the scalar density perturbations are created by a relatively low scale model of inflation which predicts the CMB anisotropy and excites Standard Model baryon a…
On using the CMB shift parameter in tests of models of dark energy
Oystein Elgaroy, Tuomas Multamaki
The so-called shift parameter is related to the position of the first acoustic peak in the power spectrum anisotropies of the cosmic microwave background (CMB) anisotropies. It is…
Suppression of the large scale curvature perturbation by interacting fluids
T. Multamaki, J. Sainio, I. Vilja
The large-scale dynamics of a two-fluid system with a time dependent interaction is studied analytically and numerically. We show how a rapid transition can significantly suppress…