65 citations · 416 across the 13 of their papers we have counts for
4 papers · 1 filter
Curvaton Dynamics in Brane-worlds
Eleftherios Papantonopoulos, Vassilios Zamarias
We study the curvaton dynamics in brane-world cosmologies. Assuming that the inflaton field survives without decay after the end of inflation, we apply the curvaton reheating mecha…
Quasi-normal Modes of Electromagnetic Perturbations of Four-Dimensional Topological Black Holes with Scalar Hair
George Koutsoumbas, Suphot Musiri, Eleftherios Papantonopoulos +1
We study the perturbative behaviour of topological black holes with scalar hair. We calculate both analytically and numerically the quasi-normal modes of the electromagnetic pertur…
Cosmology in Six Dimensions
Eleftherios Papantonopoulos
We discuss cosmological models in six-dimensional spacetime. For codimension-1 branes, we consider a (4+1) braneworld model and discuss its cosmological evolution. For codimension-…
Geometrical Tachyon Dynamics in the Background of a Bulk Tachyon Field
Eleftherios Papantonopoulos, Ioanna Pappa, Vassilios Zamarias
We study the dynamics of a D3-brane moving in the background of a bulk tachyon field of a D3-brane solution of Type-0 string theory. We show that the dynamics on the probe D3-brane…