20 citations · 75 across the 10 of their papers we have counts for
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Consistent and non-consistent deformations of gravitational theories
J. Fernando Barbero G., Marc Basquens, Bogar Díaz +1
We study the internally abelianized version of a range of gravitational theories, written in connection tetrad form, and study the possible interaction terms that can be added to t…
Hamiltonian Gotay-Nester-Hinds analysis of the parametrized unimodular extension of the Holst action
J. Fernando Barbero G., Bogar Díaz, Juan Margalef-Bentabol +1
We give a detailed account of the Hamiltonian GNH analysis of the parametrized unimodular extension of the Holst action. The purpose of the paper is to derive, through the clear ge…
Concise symplectic formulation for tetrad gravity
J. Fernando Barbero G., Bogar Díaz, Juan Margalef-Bentabol +1
We discuss a simple symplectic formulation for tetrad gravity that leads to the real Ashtekar variables in a direct and transparent way. It also sheds light on the role of the Immi…
Generalizations of the Pontryagin and Husain-Kuchař actions to manifolds with boundary
J. Fernando Barbero G., Bogar Díaz, Juan Margalef-Bentabol +1
In this paper we study a family of generalizations of the Pontryagin and Husain-Kuchař actions on manifolds with boundary. In some cases, they describe well-known models---either a…
Dirac's algorithm in the presence of boundaries: a practical guide to a geometric approach
J. Fernando Barbero G., Bogar Díaz, Juan Margalef-Bentabol +1
The goal of this paper is to propose and discuss a practical way to implement the Dirac algorithm for constrained field models defined on spatial regions with boundaries. Our metho…