60 citations · 141 across the 4 of their papers we have counts for
4 papers
Friedmann branes with variable tension
László Á. Gergely
We introduce brane-worlds with non-constant tension, strenghtening the analogy with fluid membranes, which exhibit a temperature-dependence according to the empirical law establish…
Viscous dissipative Chaplygin gas dominated homogenous and isotropic cosmological models
C. S. J. Pun, L. Á. Gergely, M. K. Mak +3
The generalized Chaplygin gas, which interpolates between a high density relativistic era and a non-relativistic matter phase, is a popular dark energy candidate. We consider a gen…
On the validity of the 5-dimensional Birkhoff theorem: The tale of an exceptional case
Zoltán Keresztes, László Á. Gergely
The 5-dimensional (5d) Birkhoff theorem gives the class of 5d vacuum space-times containing spatial hypersurfaces with cosmological symmetries. This theorem is violated by the 5d v…
Gravitational dynamics in s+1+1 dimensions II. Hamiltonian theory
Zoltán Kovács, László Á. Gergely
We develop a Hamiltonian formalism of brane-world gravity, which singles out two preferred, mutually orthogonal directions. One is a unit twist-free field of spatial vectors with i…