3 papers
gr-qc2026
Area bounds and gauge fixing: alternative canonical variables for loop gravity
Iñaki Garay, Sergio RodrÃguez-González, Raül Vera
We use a canonical parametrization of twisted geometries describing the classical phase space of loop quantum gravity on a fixed graph, and establish its explicit correspondence wi…
gr-qc2026
Cosmological Spacetimes with Sign-Changing Spatial Curvature and Topological Transitions
Gerardo GarcÃa-Moreno, Bert Janssen, Alejandro Jiménez Cano +3
Observational evidence, together with practical computations and modeling, supports a Euclidean spatial sector in the current cosmological model based on the FLRW metric. This, how…
gr-qc2025
Homothetic expansion of polyhedra in the two-vertex model: emergence of FLRW
Iñaki Garay, Sergio RodrÃguez-González, Raül Vera
The cosmological behavior associated to a U(N)-symmetry reduced sector of the loop-quantum-gravity truncation known as the two-vertex model is further explored in this work. We con…