219 citations · 1.2k across the 41 of their papers we have counts for
41 papers
Analytic solutions for the Bianchi I universe coupled to several barotropic perfect fluids
David Brizuela, Sara F. Uria
We consider the Bianchi I geometry coupled to several species of comoving barotropic perfect fluids with a linear equation of state in the context of general relativity. The soluti…
Hybrid classical-quantum systems in terms of moments
David Brizuela, Sara F. Uria
We present a consistent formalism to describe the dynamics of hybrid systems with mixed classical and quantum degrees of freedom. The probability function of the system, which, in…
Spacetime geometry from canonical spherical gravity
Asier Alonso-Bardaji, David Brizuela
We study covariant models for vacuum spherical gravity within a canonical setting. Starting from a general ansatz, we derive the most general family of Hamiltonian constraints that…
Reduction of primordial chaos by generic quantum effects
Martin Bojowald, David Brizuela, Paula Calizaya Cabrera +1
According to general relativity, the generic early-universe dynamics is chaotic. Various quantum-gravity effects have been suggested that may change this behavior in different ways…
The chaotic behavior of the Bianchi IX model under the influence of quantum effects
Martin Bojowald, David Brizuela, Paula Calizaya Cabrera +1
A quantum analysis of the vacuum Bianchi IX model is performed, focusing in particular on the chaotic nature of the system. The framework constructed here is general enough for the…
Singularity resolution by holonomy corrections: Spherical charged black holes in cosmological backgrounds
Asier Alonso-Bardaji, David Brizuela, Raül Vera
We study spherical charged black holes in the presence of a cosmological constant with corrections motivated by the theory of loop quantum gravity. The effective theory is construc…