Does anyone know?
Andy Randono has done a lot of LQG-related research, and postdoc'd at Penn State and Perimeter. Maybe you had this paper in mind. It is not strictly speaking LQG, but what he is looking for would feed into LQG, perhaps produce a new deSitter version of LQG.http://arxiv.org/abs/0909.5435
de Sitter Spaces
(Submitted on 29 Sep 2009)
"We exploit an interpretation of gravity as the symmetry broken phase of a de Sitter gauge theory to construct new solutions to the first order field equations. The new solutions are constructed by performing large Spin(4,1) gauge transformations on the ordinary de Sitter solution and extracting first the tetrad, then the induced metric. The class of metrics so obtained is an infinite class labelled by an integer, q. Each solution satisfies the local field equations defining constant positive curvature, and is therefore locally isometric to de Sitter space wherever the metric is non-degenerate. The degeneracy structure of the tetrad and metric reflects the topological differences among the solutions with different q. By topological arguments we show that the solutions are physically distinct with respect to the symmetries of Einstein-Cartan theory. Ultimately, the existence of solutions of this type may be a distinguishing characteristic of gravity as a metric theory versus gravity as a gauge theory."
There is a Pereira who writes papers with Aldrovandi. Both are located in Brazil. I don't know where he was born or what his citizenship. I only know he lives and works in Brazil, at the same institute as Aldrovandi. Both of them are senior people with lots of publications.Pereira is Brazilian! Wow, nice. I don`t know why, but I assumed he was Portuguese...
I think you are fortunate to live in a beautiful and lively city. Don't worry about the Sao Paolo people. It is much much too far to visit. I would be reluctant to go 480 km to visit my Aunt, although I might go that far to visit my Grandfather. It depends on the degree of relationship. I personally would not go 480 km to visit Jose Geraldo Pereira.Lol, I slept really bad today. I am understanding everything upside down. I live 480km from São Paulo, in Rio de Janeiro.