Publication: q-Deformed spin foam models of quantum gravity

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Title	q-Deformed spin foam models of quantum gravity
Authors/Editors*	Igor Khavkine, J. Daniel Christensen
Where published*	Classical and Quantum Gravity
How published*	Journal
Year*	2007
Volume	24
Number
Pages	3271-3290
Publisher
Keywords
Link	http://www.iop.org/EJ/abstract/0264-9381/24/13/009
Abstract	We numerically study Barrett-Crane models of Riemannian quantum gravity. We have extended the existing numerical techniques to handle q-deformed models and arbitrary space-time triangulations. We present and interpret expectation values of a few selected observables for each model, including a spin-spin correlation function which gives insight into the behaviour of the models. We find the surprising result that, as the deformation parameter q goes to 1 through roots of unity, the limit is discontinuous.