%0 Journal Article %1 ConradyFreidel2008 %A Conrady, Florian %A Freidel, Laurent %D 2008 %K lqg spinfoam %T On the semiclassical limit of 4d spin foam models %U http://arxiv.org/abs/0809.2280 %X We study the semiclassical properties of the Riemannian spin foam models with Immirzi parameter that are constructed via coherent states. We show that in the semiclassical limit the quantum spin foam amplitudes of an arbitrary triangulation are exponentially suppressed, if the face spins do not correspond to a discrete geometry. When they do arise from a geometry, the amplitudes reduce to the exponential of i times the Regge action. Remarkably, the dependence on the Immirzi parameter disappears in this limit.

@article{ConradyFreidel2008, abstract = { We study the semiclassical properties of the Riemannian spin foam models with Immirzi parameter that are constructed via coherent states. We show that in the semiclassical limit the quantum spin foam amplitudes of an arbitrary triangulation are exponentially suppressed, if the face spins do not correspond to a discrete geometry. When they do arise from a geometry, the amplitudes reduce to the exponential of i times the Regge action. Remarkably, the dependence on the Immirzi parameter disappears in this limit. }, added-at = {2010-02-08T16:19:08.000+0100}, author = {Conrady, Florian and Freidel, Laurent}, biburl = {https://www.bibsonomy.org/bibtex/2c4befdb49736d7a492b7474dcf4e9193/random3f}, description = {[0809.2280] On the semiclassical limit of 4d spin foam models}, interhash = {50191c2c9de6abfb50f4b76e5b484142}, intrahash = {c4befdb49736d7a492b7474dcf4e9193}, keywords = {lqg spinfoam}, note = {cite arxiv:0809.2280 Comment: 32 pages, 5 figures}, timestamp = {2010-02-08T16:19:08.000+0100}, title = {On the semiclassical limit of 4d spin foam models}, url = {http://arxiv.org/abs/0809.2280}, year = 2008 }