2 papers
gr-qc2001
Immirzi parameter in the Barrett-Crane model?
Richard E. Livine
We study the generalised constrained BF theory described in gr-qc/0102073 in order to introduce the Immirzi parameter in spin foam models. We show that the resulting spin foam mode…
gr-qc2001
Length versus time-interval discreteness in 2+1 Lorentzian canonical quantum gravity
Richard Livine, Carlo Rovelli
Paper withdrawn. Replaced by by gr-qc/0212077 .