36 citations · 146 across the 10 of their papers we have counts for
10 papers
Versatile parametrization of the perturbation growth rate on the phantom brane
Alexander Viznyuk, Satadru Bag, Yuri Shtanov +1
We derive an analytical expression for the growth rate of matter density perturbations on the phantom brane (which is the normal branch of the Dvali-Gabadadze-Porrati model). This…
Cosmological perturbations on the Phantom brane
Satadru Bag, Alexander Viznyuk, Yuri Shtanov +1
We obtain a closed system of equations for scalar perturbations in a multi-component braneworld. Our braneworld possesses a phantom-like equation of state at late times, $w_{\rm ef…
A no-boundary proposal for braneworld perturbations
Alexander Viznyuk, Yuri Shtanov, Varun Sahni
We propose a novel approach to the problem of cosmological perturbations in a braneworld model with induced gravity, which leads to a closed system of equations on the brane. We fo…
Asymmetric embedding in brane cosmology
Yuri Shtanov, Alexander Viznyuk, Luis Norberto Granda
We derive a system of cosmological equations for a braneworld with induced curvature which is a junction between several bulk spaces. The permutation symmetry of the bulk spaces is…
Spherically symmetric problem on the brane and galactic rotation curves
Alexander Viznyuk, Yuri Shtanov
We investigate the braneworld model with induced gravity to clarify the role of the cross-over length scale \ell in the possible explanation of the dark-matter phenomenon in astrop…
Gravitational instability on the brane: the role of boundary conditions
Yuri Shtanov, Alexander Viznyuk, Varun Sahni
An outstanding issue in braneworld theory concerns the setting up of proper boundary conditions for the brane-bulk system. Boundary conditions (BC's) employing regulatory branes or…