O. Sergijenko

activity

20082010

most citedPerturbed dark energy: classical scalar field versus tachyon

9 citations · 21 across the 4 of their papers we have counts for

collaborators

Showing 2008Show all

2 papers · 1 filter

astro-ph2008★ 1 cited

Evolution of scalar perturbations in cosmology with quintessential dark energy

B. Novosyadlyj, O. Sergijenko

The dynamics of expansion of the Universe and evolution of scalar perturbations are studied for the quintessential scalar fields $Q$ with the classical Lagrangian satisfying the ad…

astro-ph2008★ 9 cited

Scalar Field as Dark Energy Accelerating Expansion of the Universe

O. Sergijenko, B. Novosyadlyj

The features of a homogeneous scalar field $ϕ$ with classical Lagrangian $L = ϕ_{; i} ϕ^{; i} /2 - V (ϕ)$ and tachyon field Lagrangian $L = - V (ϕ) 1 - ϕ_{; i} ϕ^{; i}$ causing the observable…