3 papers
gr-qc2025
Covariant non-perturbative pointer variables for quantum fields
Alejandro Blanco Sánchez, Luis J. Garay, Jose de Ramón
We describe the dynamics of a detector modeled by a harmonic oscillator coupled with an otherwise free quantum field in a curved spacetime in terms of covariant equations of motion…
gr-qc2025
The two-vertex model of loop quantum gravity: anisotropic reduced sectors
Iñaki Garay, Luis J. Garay, Diego H. Gugliotta
The so-called two-vertex model of loop quantum gravity has been analytically studied in the past within a U() symmetry-reduced sector leading to a cosmological interpretation. I…
gr-qc2024
Mimicking wormholes in Born-Infeld electrodynamics
Jose Beltrán Jiménez, Luis J. Garay, María Pérez Garrote
We compute the evolution of linear perturbations on top of a background solution of a general nonlinear electromagnetic theory. This evolution can be described in terms of two effe…