2 papers
gr-qc2005
Gravitational helicity interaction
A. Barbieri, E. Guadagnini
For gravitational deflections of massless particles of given helicity from a classical rotating body, we describe the general relativity corrections to the geometric optics approxi…
gr-qc1997
Space of the vertices of relativistic spin networks
A. Barbieri
The general solutin to the constraints that define relativistic spin networks vertices is given and their relations with 3-dimensional quantum tetrahedra is dicussed. An alternativ…