3 papers
gr-qc2001
A finiteness proof for the Lorentzian state sum spinfoam model for quantum general relativity
Louis Crane, Alejandro Perez, Carlo Rovelli
We show that the normalized Lorentzian state sum is finite on any triangulation. It thus provides a candidate for a perturbatively finite quantum theory of general relativity in fo…
gr-qc2001
2d manifold-independent spinfoam theory
Etera R. Livine, Alejandro Perez, Carlo Rovelli
A number of background independent quantizations procedures have recently been employed in 4d nonperturbative quantum gravity. We investigate and illustrate these techniques and th…
gr-qc2000
Characterizing exact solutions from asymptotic physical concepts
Alejandro Perez, Osvaldo M. Moreschi
We contribute to the subject of the physical interpretation of exact solutions by characterizing them through a systematic study in terms of unambiguous physical concepts coming fr…