Spin Foam Models of Quantum Gravity

  • Published 2004


We give a short review of the spin foam models of quantum gravity , with an emphasis on the Barret-Crane model. After explaining the shortcomings of the Barret-Crane model, we briefly discuss two new approaches , one based on the 3d spin foam state sum invariants for the embedded spin networks, and the other based on representing the string scattering… (More)


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