The loop-quantum-gravity vertex-amplitude
| dc.creator | Engle, Jonathan | |
| dc.creator | Pereira, Roberto | |
| dc.creator | Rovelli, Carlo | |
| dc.date | 2007-05-16 | |
| dc.date.accessioned | 2026-07-07T11:16:10Z | |
| dc.date.available | 2026-07-07T11:16:10Z | |
| dc.description | Spinfoam theories are hoped to provide the dynamics of non-perturbative loop quantum gravity. But a number of their features remain elusive. The best studied one -the euclidean Barrett-Crane model- does not have the boundary state space needed for this, and there are recent indications that, consequently, it may fail to yield the correct low-energy $n$-point functions. These difficulties can be traced to the SO(4) -> SU(2) gauge fixing and the way certain second class constraints are imposed, arguably incorrectly, strongly. We present an alternative model, that can be derived as a bona fide quantization of a Regge discretization of euclidean general relativity, and where the constraints are imposed weakly. Its state space is a natural subspace of the SO(4) spin-network space and matches the SO(3) hamiltonian spin network space. The model provides a long sought SO(4)-covariant vertex amplitude for loop quantum gravity. | |
| dc.description | 6pages | |
| dc.identifier | https://arxiv.org/abs/0705.2388 | |
| dc.identifier | http://arxiv.org/abs/0705.2388 | |
| dc.identifier | Phys.Rev.Lett.99:161301,2007 | |
| dc.identifier | doi:10.1103/PhysRevLett.99.161301 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/192582 | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.title | The loop-quantum-gravity vertex-amplitude | |
| dc.type | text |