Dittrich, BiancaMartín Benito, MercedesSchnetter, Erik2024-02-052024-02-052013-10-0710.1088/1367-2630/15/10/103004https://hdl.handle.net/20.500.14352/98920Spin foams are models of quantum gravity and therefore quantum space time. A key open issue is to determine the possible continuum phases of these models. Progress on this issue has been prohibited by the complexity of the full four-dimensional models. We consider here simplified analogue models, so called spin nets, that retain the main dynamical ingredient of spin foams, the simplicity constraints. For a certain class of these spin net models we determine the phase diagram and therefore the continuum phases via a coarse graining procedure based on tensor network renormalization. This procedure will also reveal an unexpected fixed point, which turns out to define a new triangulation invariant vertex model. © IOP Publishing and Deutsche Physikalische Gesellschaft.engAttribution 4.0 Internationaljournal article1367-2630https://iopscience.iop.org/article/10.1088/1367-2630/15/10/103004https://iopscience.iop.orgopen access530.145Teoría de los quanta2212 Física Teórica