173 citations · 686 across the 19 of their papers we have counts for
4 papers · 1 filter
Generating Gowdy cosmological models
A. Sanchez, A. Macias, H. Quevedo
Using the analogy with stationary axisymmetric solutions, we present a method to generate new analytic cosmological solutions of Einstein's equation belonging to the class of …
Thermodynamic scheme of inhomogeneous perfect fluid mixtures
Ruben D. Zarate, Hernando Quevedo
We analyze the compatibility between the geometrodynamics and thermodynamics of a binary mixture of perfect fluids which describe inhomogeneous cosmological models. We generalize t…
Towards the entropy of gravity time-dependent models via the Cardy-Verlinde formula
Octavio Obregon, Leonardo Patino, Hernando Quevedo
For models with several time-dependent components generalized entropies can be defined. This is shown for the Bianchi type IX model. We first derive the Cardy-Verlinde formula unde…
Hopf Algebra Primitives in Perturbation Quantum Field Theory
M. Rosenbaum, J. David Vergara, H. Quevedo
The analysis of the combinatorics resulting from the perturbative expansion of the transition amplitude in quantum field theories, and the relation of this expansion to the Hausdor…